Merge branch 'master' of https://github.com/rmcrackan/Libation

Improve library scan speed and Track and display book availability

.github/workflows/build-linux.yml

@@ -23,10 +23,10 @@ env:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [Linux, MacOS]
+        os: [ubuntu-latest, macos-latest]
         arch: [x64, arm64]
     steps:
       - uses: actions/checkout@v3
@@ -45,62 +45,63 @@ jobs:
           then
             version="${inputVersion}"
           else
-            version="$(grep -oP '(?<=<Version>).*(?=</Version)' ./Source/AppScaffolding/AppScaffolding.csproj)"
+            version="$(grep -Eio -m 1 '<Version>.*</Version>' ./Source/AppScaffolding/AppScaffolding.csproj | sed -r 's/<\/?Version>//g')"
           fi
           echo "version=${version}" >> "${GITHUB_OUTPUT}"
-
       - name: Unit test
         if: ${{ inputs.run_unit_tests }}
         working-directory: ./Source
         run: dotnet test
 
       - name: Publish
+        id: publish
         working-directory: ./Source
         run: |
           os=${{ matrix.os }}
-          RUNTIME_IDENTIFIER="$(echo ${os,} | sed 's/macOS/osx/')-${{ matrix.arch }}"
+          target_os="$(echo ${os/-latest/} | sed 's/ubuntu/linux/')"
+          display_os="$(echo ${target_os/macos/macOS} | sed 's/linux/Linux/')"
+          echo "display_os=${display_os}" >> $GITHUB_OUTPUT
+          RUNTIME_IDENTIFIER="$(echo ${target_os/macos/osx})-${{ matrix.arch }}"
           echo "$RUNTIME_IDENTIFIER"
           dotnet publish \
               LibationAvalonia/LibationAvalonia.csproj \
               --runtime "$RUNTIME_IDENTIFIER" \
               --configuration ${{ env.DOTNET_CONFIGURATION }} \
-              --output bin/Publish/${{ matrix.os }}-${{ matrix.arch }}-${{ env.RELEASE_NAME }} \
-              -p:PublishProfile=LibationAvalonia/Properties/PublishProfiles/${{ matrix.os }}Profile.pubxml
+              --output bin/Publish/${display_os}-${{ matrix.arch }}-${{ env.RELEASE_NAME }} \
+              -p:PublishProfile=LibationAvalonia/Properties/PublishProfiles/${display_os}Profile.pubxml
           dotnet publish \
-              LoadByOS/${{ matrix.os }}ConfigApp/${{ matrix.os }}ConfigApp.csproj \
+              LoadByOS/${display_os}ConfigApp/${display_os}ConfigApp.csproj \
               --runtime "$RUNTIME_IDENTIFIER" \
               --configuration ${{ env.DOTNET_CONFIGURATION }} \
-              --output bin/Publish/${{ matrix.os }}-${{ matrix.arch }}-${{ env.RELEASE_NAME }} \
-              -p:PublishProfile=LoadByOS/Properties/${{ matrix.os }}ConfigApp/PublishProfiles/${{ matrix.os }}Profile.pubxml
+              --output bin/Publish/${display_os}-${{ matrix.arch }}-${{ env.RELEASE_NAME }} \
+              -p:PublishProfile=LoadByOS/Properties/${display_os}ConfigApp/PublishProfiles/${display_os}Profile.pubxml
           dotnet publish \
               LibationCli/LibationCli.csproj \
               --runtime "$RUNTIME_IDENTIFIER" \
               --configuration ${{ env.DOTNET_CONFIGURATION }} \
-              --output bin/Publish/${{ matrix.os }}-${{ matrix.arch }}-${{ env.RELEASE_NAME }} \
-              -p:PublishProfile=LibationCli/Properties/PublishProfiles/${{ matrix.os }}Profile.pubxml
+              --output bin/Publish/${display_os}-${{ matrix.arch }}-${{ env.RELEASE_NAME }} \
+              -p:PublishProfile=LibationCli/Properties/PublishProfiles/${display_os}Profile.pubxml
           dotnet publish \
               HangoverAvalonia/HangoverAvalonia.csproj \
               --runtime "$RUNTIME_IDENTIFIER" \
               --configuration ${{ env.DOTNET_CONFIGURATION }} \
-              --output bin/Publish/${{ matrix.os }}-${{ matrix.arch }}-${{ env.RELEASE_NAME }} \
-              -p:PublishProfile=HangoverAvalonia/Properties/PublishProfiles/${{ matrix.os }}Profile.pubxml
-          
+              --output bin/Publish/${display_os}-${{ matrix.arch }}-${{ env.RELEASE_NAME }} \
+              -p:PublishProfile=HangoverAvalonia/Properties/PublishProfiles/${display_os}Profile.pubxml
       - name: Build bundle
         id: bundle
-        working-directory: ./Source/bin/Publish/${{ matrix.os }}-${{ matrix.arch }}-${{ env.RELEASE_NAME }}
+        working-directory: ./Source/bin/Publish/${{ steps.publish.outputs.display_os }}-${{ matrix.arch }}-${{ env.RELEASE_NAME }}
         run: |
           BUNDLE_DIR=$(pwd)
           echo "Bundle dir: ${BUNDLE_DIR}"
           cd ..
-          SCRIPT=../../../Scripts/Bundle_${{ matrix.os }}.sh
+          SCRIPT=../../../Scripts/Bundle_${{ steps.publish.outputs.display_os }}.sh
           chmod +rx ${SCRIPT}
           ${SCRIPT} "${BUNDLE_DIR}" "${{ steps.get_version.outputs.version }}" "${{ matrix.arch }}"
           artifact=$(ls ./bundle)
           echo "artifact=${artifact}" >> "${GITHUB_OUTPUT}"
-          
       - name: Publish bundle
         uses: actions/upload-artifact@v3
         with:
           name: ${{ steps.bundle.outputs.artifact }}
           path: ./Source/bin/Publish/bundle/${{ steps.bundle.outputs.artifact }}
-          if-no-files-found: error
+          if-no-files-found: error

.vscode/launch.json

@@ -0,0 +1,21 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+
+        {
+            "name": ".NET Core Launch (console)",
+            "type": "coreclr",
+            "request": "launch",
+            "preLaunchTask": "build",
+            "program": "${workspaceFolder}/Source/bin/Avalonia/Debug/Libation.dll",
+            "args": [],
+            "cwd": "${workspaceFolder}",
+            "stopAtEntry": false,
+            "console": "internalConsole"
+        }
+
+    ]
+}

.vscode/tasks.json

@@ -0,0 +1,42 @@
+{
+    // See https://go.microsoft.com/fwlink/?LinkId=733558
+    // for the documentation about the tasks.json format
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build",
+            "dependsOn": [
+                "build_libation",
+                "build_linuxconfigapp"
+            ]
+        },
+        {
+            "label": "build_libation",
+            "type": "shell",
+            "command": "dotnet",
+            "args": [
+                "build",
+                "${workspaceFolder}/Source/LibationAvalonia/LibationAvalonia.csproj"
+            ],
+            "group": "build",
+            "presentation": {
+                //"reveal": "silent"
+            },
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "build_linuxconfigapp",
+            "type": "shell",
+            "command": "dotnet",
+            "args": [
+                "build",
+                "${workspaceFolder}/Source/LoadByOS/LinuxConfigApp/LinuxConfigApp.csproj"
+            ],
+            "group": "build",
+            "presentation": {
+                //"reveal": "silent"
+            },
+            "problemMatcher": "$msCompile"
+        }
+    ]
+}

Documentation/Advanced.md

@@ -1,6 +1,6 @@
 ## [Download Libation](https://github.com/rmcrackan/Libation/releases/latest)
 
-### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PalPal.me](https://paypal.me/mcrackan?locale.x=en_us)
+### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/mcrackan?locale.x=en_us)
 ...or just tell more friends. As long as I'm maintaining this software, it will remain **free** and **open source**.
 
 

Documentation/Docker.md

@@ -1,6 +1,6 @@
 ## [Download Libation](https://github.com/rmcrackan/Libation/releases/latest)
 
-### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PalPal.me](https://paypal.me/mcrackan?locale.x=en_us)
+### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/mcrackan?locale.x=en_us)
 ...or just tell more friends. As long as I'm maintaining this software, it will remain **free** and **open source**.
 
 

Documentation/GettingStarted.md

@@ -1,6 +1,6 @@
 ## [Download Libation](https://github.com/rmcrackan/Libation/releases/latest)
 
-### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PalPal.me](https://paypal.me/mcrackan?locale.x=en_us)
+### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/mcrackan?locale.x=en_us)
 ...or just tell more friends. As long as I'm maintaining this software, it will remain **free** and **open source**.
 
 

Documentation/InstallOnLinux.md

@@ -1,6 +1,6 @@
 ## [Download Libation](https://github.com/rmcrackan/Libation/releases/latest)
 
-### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PalPal.me](https://paypal.me/mcrackan?locale.x=en_us)
+### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/mcrackan?locale.x=en_us)
 ...or just tell more friends. As long as I'm maintaining this software, it will remain **free** and **open source**.
 
 

Documentation/InstallOnMac.md

@@ -1,6 +1,6 @@
 ## [Download Libation](https://github.com/rmcrackan/Libation/releases/latest)
 
-### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PalPal.me](https://paypal.me/mcrackan?locale.x=en_us)
+### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/mcrackan?locale.x=en_us)
 ...or just tell more friends. As long as I'm maintaining this software, it will remain **free** and **open source**.
 
 
@@ -9,13 +9,16 @@ This walkthrough should get you up and running with Libation on your Mac.
 
 ## Install Libation
 
-- Download the `Libation.app-macOS-x64-x.x.x.tgz` file from the latest release and extract it. 
+- Download the file from the latest release and extract it.
+  - Apple Silicon (M1, M2, ...): `Libation.9.4.2-macOS-chardonnay-`**arm64**`.tgz`
+  - Intel: `Libation.x.x.x-macOS-chardonnay-`**x64**`.tgz`
 - Move the extracted Libation app bundle to your applications folder.
 - Open a terminal (Go > Utilities > Terminal)
 - Copy/paste/run the following command (you'll be prompted to enter your password)
+  
   ```Console
   sudo spctl --master-disable && sudo spctl --add --label "Libation" /Applications/Libation.app && open /Applications/Libation.app && sudo spctl --master-enable
-  ```
+  ```  
 - Close the terminal and use Libation!
 
 ## Running Hangover

Documentation/SearchingAndFiltering.md

@@ -1,6 +1,6 @@
 ## [Download Libation](https://github.com/rmcrackan/Libation/releases/latest)
 
-### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PalPal.me](https://paypal.me/mcrackan?locale.x=en_us)
+### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/mcrackan?locale.x=en_us)
 ...or just tell more friends. As long as I'm maintaining this software, it will remain **free** and **open source**.
 
 

README.md

@@ -2,7 +2,7 @@
 
 ## [Download Libation](https://github.com/rmcrackan/Libation/releases/latest)
 
-### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PalPal.me](https://paypal.me/mcrackan?locale.x=en_us)
+### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/mcrackan?locale.x=en_us)
 ...or just tell more friends. As long as I'm maintaining this software, it will remain **free** and **open source**.
 
 # Table of Contents

Scripts/Bundle_Linux.sh

@@ -88,38 +88,27 @@ cp $FOLDER_EXEC/Libation.desktop $FOLDER_DESKTOP/Libation.desktop
 
 echo "Creating pre-install file..."
 echo "#!/bin/bash
-
 # Pre-install script, removes previous installation program files and sym links
-
 echo \"Removing previously created symlinks...\"
-
 rm /usr/bin/libation
 rm /usr/bin/hangover
 rm /usr/bin/libationcli
-
 echo \"Removing previously installed Libation files...\"
-
 rm -r /usr/lib/libation
-
 # making sure it won't stop installation
 exit 0
 " >> $FOLDER_DEBIAN/preinst
 
 echo "Creating post-install file..."
 echo "#!/bin/bash
-
 gtk-update-icon-cache -f /usr/share/icons/hicolor/
-
 ln -s /usr/lib/libation/Libation /usr/bin/libation
 ln -s /usr/lib/libation/Hangover /usr/bin/hangover
 ln -s /usr/lib/libation/LibationCli /usr/bin/libationcli
-
 # Increase the maximum number of inotify instances
-
-if ! grep -q 'fs.inotify.max_user_instances=524288' /etc/sysctl.conf; then  
+if ! grep -q 'fs.inotify.max_user_instances=524288' /etc/sysctl.conf; then
   echo fs.inotify.max_user_instances=524288 | tee -a /etc/sysctl.conf && sysctl -p
 fi
-
 # workaround until this file is moved to the user's home directory
 touch /usr/lib/libation/appsettings.json
 chmod 666 /usr/lib/libation/appsettings.json
@@ -139,6 +128,11 @@ echo "Changing permissions for pre- and post-install files..."
 chmod +x "$FOLDER_DEBIAN/preinst"
 chmod +x "$FOLDER_DEBIAN/postinst"
 
+if [ "$(uname -s)" == "Darwin" ]; then
+  echo "macOS detected, installing dpkg"
+  brew install dpkg
+fi
+
 DEB_FILE=Libation.${VERSION}-linux-chardonnay-${ARCH}.deb
 echo "Creating $DEB_FILE"
 dpkg-deb -Zxz --build $DEB_DIR ./$DEB_FILE
@@ -149,4 +143,4 @@ mv $DEB_FILE ./bundle/$DEB_FILE
 
 rm -r "$BIN_DIR"
 
-echo "Done!"
+echo "Done!"

Scripts/Bundle_MacOS.sh

@@ -65,6 +65,9 @@ if [ $? -ne 0 ]
  exit
 fi
 
+echo "Make fileicon executable..."
+chmod +x $BUNDLE_MACOS/fileicon
+
 echo "Moving icon..."
 mv $BUNDLE_MACOS/libation.icns $BUNDLE_RESOURCES/libation.icns
 
@@ -96,6 +99,9 @@ done
 
 APP_FILE=Libation.${VERSION}-macOS-chardonnay-${ARCH}.tgz
 
+echo "Signing executables in: $BUNDLE"
+codesign --force --deep -s - $BUNDLE
+
 echo "Creating app bundle: $APP_FILE"
 tar -czvf $APP_FILE $BUNDLE
 
@@ -105,4 +111,4 @@ mv $APP_FILE ./bundle/$APP_FILE
 
 rm -r $BUNDLE
 
-echo "Done!"
+echo "Done!"

Source/AaxDecrypter/AaxDecrypter.csproj

@@ -13,7 +13,7 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-	  <PackageReference Include="AAXClean.Codecs" Version="0.5.16" />
+	  <PackageReference Include="AAXClean.Codecs" Version="1.0.0" />
 	</ItemGroup>
 
 	<ItemGroup>

Source/AaxDecrypter/AaxcDownloadConvertBase.cs

@@ -40,8 +40,14 @@ namespace AaxDecrypter
 				AaxFile.AppleTags.Album = AaxFile.AppleTags.Album?.Replace(" (Unabridged)", "");
 			}
 
-			if (DownloadOptions.FixupFile && !string.IsNullOrWhiteSpace(AaxFile.AppleTags.Narrator))
-				AaxFile.AppleTags.AppleListBox.EditOrAddTag("TCOM", AaxFile.AppleTags.Narrator);
+			if (DownloadOptions.FixupFile)
+			{
+				if (!string.IsNullOrWhiteSpace(AaxFile.AppleTags.Narrator))
+					AaxFile.AppleTags.AppleListBox.EditOrAddTag("TCOM", AaxFile.AppleTags.Narrator);
+
+				if (!string.IsNullOrWhiteSpace(AaxFile.AppleTags.Copyright))
+					AaxFile.AppleTags.Copyright = AaxFile.AppleTags.Copyright.Replace("(P)", "℗").Replace("©", "©");
+			}
 
 			//Finishing configuring lame encoder.
 			if (DownloadOptions.OutputFormat == OutputFormat.Mp3)

Source/AaxDecrypter/AaxcDownloadMultiConverter.cs

@@ -93,15 +93,13 @@ That naming may not be desirable for everyone, but it's an easy change to instea
 				? AaxFile.ConvertToMultiMp4aAsync
 				(
 					splitChapters,
-					newSplitCallback => newSplit(++chapterCount, splitChapters, newSplitCallback),
-					DownloadOptions.TrimOutputToChapterLength
+					newSplitCallback => newSplit(++chapterCount, splitChapters, newSplitCallback)
 				)
 				: AaxFile.ConvertToMultiMp3Async
 				(
 					splitChapters,
 					newSplitCallback => newSplit(++chapterCount, splitChapters, newSplitCallback),
-					DownloadOptions.LameConfig,
-					DownloadOptions.TrimOutputToChapterLength
+					DownloadOptions.LameConfig
 				);
 
 			void newSplit(int currentChapter, ChapterInfo splitChapters, NewSplitCallback newSplitCallback)

Source/AaxDecrypter/AaxcDownloadSingleConverter.cs

@@ -3,6 +3,7 @@ using AAXClean.Codecs;
 using Dinah.Core.Net.Http;
 using FileManager;
 using System;
+using System.Diagnostics;
 using System.IO;
 using System.Threading.Tasks;
 
@@ -14,12 +15,15 @@ namespace AaxDecrypter
 		public AaxcDownloadSingleConverter(string outFileName, string cacheDirectory, IDownloadOptions dlOptions)
 			: base(outFileName, cacheDirectory, dlOptions)
 		{
+			var step = 1;
 
 			AsyncSteps.Name = $"Download and Convert Aaxc To {DownloadOptions.OutputFormat}";
-			AsyncSteps["Step 1: Get Aaxc Metadata"] = () => Task.Run(Step_GetMetadata);
-			AsyncSteps["Step 2: Download Decrypted Audiobook"] = Step_DownloadAndDecryptAudiobookAsync;
-			AsyncSteps["Step 3: Download Clips and Bookmarks"] = Step_DownloadClipsBookmarksAsync;
-			AsyncSteps["Step 4: Create Cue"] = Step_CreateCueAsync;
+			AsyncSteps[$"Step {step++}: Get Aaxc Metadata"] = () => Task.Run(Step_GetMetadata);
+			AsyncSteps[$"Step {step++}: Download Decrypted Audiobook"] = Step_DownloadAndDecryptAudiobookAsync;
+			if (DownloadOptions.MoveMoovToBeginning && DownloadOptions.OutputFormat is OutputFormat.M4b)
+				AsyncSteps[$"Step {step++}: Move moov atom to beginning"] = Step_MoveMoov;
+			AsyncSteps[$"Step {step++}: Download Clips and Bookmarks"] = Step_DownloadClipsBookmarksAsync;
+			AsyncSteps[$"Step {step++}: Create Cue"] = Step_CreateCueAsync;
 		}
 
 		protected async override Task<bool> Step_DownloadAndDecryptAudiobookAsync()
@@ -31,18 +35,7 @@ namespace AaxDecrypter
 
 			try
 			{
-				await (AaxConversion = decryptAsync(outputFile));
-
-				if (AaxConversion.IsCompletedSuccessfully
-					&& DownloadOptions.MoveMoovToBeginning
-					&& DownloadOptions.OutputFormat is OutputFormat.M4b)
-				{
-					outputFile.Close();
-					AaxConversion = Mp4File.RelocateMoovAsync(OutputFileName);
-					AaxConversion.ConversionProgressUpdate += AaxConversion_MoovProgressUpdate;
-					await AaxConversion;
-					AaxConversion.ConversionProgressUpdate -= AaxConversion_MoovProgressUpdate;
-				}
+				await (AaxConversion = decryptAsync(outputFile));				
 
 				return AaxConversion.IsCompletedSuccessfully;
 			}
@@ -52,23 +45,30 @@ namespace AaxDecrypter
 			}
 		}
 
+		private async Task<bool> Step_MoveMoov()
+		{
+			AaxConversion = Mp4File.RelocateMoovAsync(OutputFileName);
+			AaxConversion.ConversionProgressUpdate += AaxConversion_MoovProgressUpdate;
+			await AaxConversion;
+			AaxConversion.ConversionProgressUpdate -= AaxConversion_MoovProgressUpdate;
+			return AaxConversion.IsCompletedSuccessfully;
+		}
+
 		private void AaxConversion_MoovProgressUpdate(object sender, ConversionProgressEventArgs e)
 		{
 			averageSpeed.AddPosition(e.ProcessPosition.TotalSeconds);
 
-			var remainingTimeToProcess = (e.TotalDuration - e.ProcessPosition).TotalSeconds;
+			var remainingTimeToProcess = (e.EndTime - e.ProcessPosition).TotalSeconds;
 			var estTimeRemaining = remainingTimeToProcess / averageSpeed.Average;
 
 			if (double.IsNormal(estTimeRemaining))
 				OnDecryptTimeRemaining(TimeSpan.FromSeconds(estTimeRemaining));
 
-			var progressPercent = 100d * (1 - remainingTimeToProcess / e.TotalDuration.TotalSeconds);
-
 			OnDecryptProgressUpdate(
 				new DownloadProgress
 				{
-					ProgressPercentage = progressPercent,
-					BytesReceived = (long)(InputFileStream.Length * progressPercent),
+					ProgressPercentage = 100 * e.FractionCompleted,
+					BytesReceived = (long)(InputFileStream.Length * e.FractionCompleted),
 					TotalBytesToReceive = InputFileStream.Length
 				});
 		}
@@ -79,15 +79,13 @@ namespace AaxDecrypter
 			(
 				outputFile,
 				DownloadOptions.LameConfig,
-				DownloadOptions.ChapterInfo,
-				DownloadOptions.TrimOutputToChapterLength
+				DownloadOptions.ChapterInfo
 			)
 			: DownloadOptions.FixupFile
 			? AaxFile.ConvertToMp4aAsync
 			(
 				outputFile,
-				DownloadOptions.ChapterInfo,
-				DownloadOptions.TrimOutputToChapterLength
+				DownloadOptions.ChapterInfo
 			)
 			: AaxFile.ConvertToMp4aAsync(outputFile);
 	}

Source/AaxDecrypter/AudiobookDownloadBase.cs

@@ -3,7 +3,6 @@ using Dinah.Core.Net.Http;
 using Dinah.Core.StepRunner;
 using FileManager;
 using System;
-using System.Diagnostics;
 using System.IO;
 using System.Threading.Tasks;
 
@@ -27,6 +26,7 @@ namespace AaxDecrypter
 		protected IDownloadOptions DownloadOptions { get; }
 		protected NetworkFileStream InputFileStream => nfsPersister.NetworkFileStream;
 		protected virtual long InputFilePosition => InputFileStream.Position;
+		private bool downloadFinished;
 
 		private readonly NetworkFileStreamPersister nfsPersister;
 		private readonly DownloadProgress zeroProgress;
@@ -84,7 +84,11 @@ namespace AaxDecrypter
 			{
 				AverageSpeed averageSpeed = new();
 
-				while (InputFileStream.CanRead && InputFileStream.Length > InputFilePosition && !InputFileStream.IsCancelled)
+				while (
+					InputFileStream.CanRead
+					&& InputFileStream.Length > InputFilePosition
+					&& !InputFileStream.IsCancelled
+					&& !downloadFinished)
 				{
 					averageSpeed.AddPosition(InputFilePosition);
 
@@ -138,8 +142,7 @@ namespace AaxDecrypter
 		protected virtual void FinalizeDownload()
 		{
 			nfsPersister?.Dispose();
-			OnDecryptTimeRemaining(TimeSpan.Zero);
-			OnDecryptProgressUpdate(zeroProgress);
+			downloadFinished = true;
 		}
 
 		protected async Task<bool> Step_DownloadClipsBookmarksAsync()
@@ -221,6 +224,7 @@ namespace AaxDecrypter
 			}
 			finally
 			{
+				nfsp.NetworkFileStream.RequestHeaders["User-Agent"] = DownloadOptions.UserAgent;
 				nfsp.NetworkFileStream.SpeedLimit = DownloadOptions.DownloadSpeedBps;
 			}
 

Source/AaxDecrypter/MpegUtil.cs

@@ -1,5 +1,6 @@
 using AAXClean;
 using NAudio.Lame;
+using System;
 
 namespace AaxDecrypter
 {
@@ -9,17 +10,26 @@ namespace AaxDecrypter
 		{
 			double bitrateMultiple = 1;
 
+			if (mp4File.TimeScale < lameConfig.OutputSampleRate)
+			{
+				lameConfig.OutputSampleRate = mp4File.TimeScale;
+			}
+			else if (mp4File.TimeScale > lameConfig.OutputSampleRate)
+			{
+				bitrateMultiple *= (double)lameConfig.OutputSampleRate / mp4File.TimeScale;
+			}
+
 			if (mp4File.AudioChannels == 2)
 			{
 				if (downsample)
-					bitrateMultiple = 0.5;
+					bitrateMultiple /= 2;
 				else
 					lameConfig.Mode = MPEGMode.Stereo;
 			}
 
 			if (matchSourceBitrate)
 			{
-				int kbps = (int)(mp4File.AverageBitrate * bitrateMultiple / 1024);
+				int kbps = (int)Math.Round(mp4File.AverageBitrate * bitrateMultiple / 1024);
 
 				if (lameConfig.VBR is null)
 					lameConfig.BitRate = kbps;

Source/AaxDecrypter/NetworkFileStream.cs

@@ -14,6 +14,7 @@ namespace AaxDecrypter
 	public class NetworkFileStream : Stream, IUpdatable
 	{
 		public event EventHandler Updated;
+		public event EventHandler DownloadCompleted;
 
 		#region Public Properties
 
@@ -139,7 +140,10 @@ namespace AaxDecrypter
 		public async Task BeginDownloadingAsync()
 		{
 			if (ContentLength != 0 && WritePosition == ContentLength)
+			{
+				_backgroundDownloadTask = Task.CompletedTask;
 				return;
+			}
 
 			if (ContentLength != 0 && WritePosition > ContentLength)
 				throw new WebException($"Specified write position (0x{WritePosition:X10}) is larger than  {nameof(ContentLength)} (0x{ContentLength:X10}).");
@@ -230,6 +234,7 @@ namespace AaxDecrypter
 				_writeFile.Close();
 				_downloadedPiece.Set();
 				OnUpdate();
+				DownloadCompleted?.Invoke(this, null);
 			}
 		}
 

Source/AaxDecrypter/UnencryptedAudiobookDownloader.cs

@@ -26,8 +26,11 @@ namespace AaxDecrypter
 
 		protected override async Task<bool> Step_DownloadAndDecryptAudiobookAsync()
 		{
-			while (InputFilePosition < InputFileStream.Length && !InputFileStream.IsCancelled)
-				await Task.Delay(200);
+			TaskCompletionSource completionSource = new();
+
+			InputFileStream.DownloadCompleted += (_, _) => completionSource.SetResult();
+
+			await completionSource.Task;
 
 			if (IsCanceled)
 				return false;

Source/AppScaffolding/AppScaffolding.csproj

@@ -2,7 +2,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>net7.0</TargetFramework>
-    <Version>9.3.3.1</Version>
+    <Version>9.4.4.1</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Octokit" Version="5.0.0" />

Source/AppScaffolding/LibationScaffolding.cs

@@ -75,13 +75,15 @@ namespace AppScaffolding
 			??= new[] { ExecutingAssembly.GetName(), EntryAssembly.GetName() }
 			.Max(a => a.Version);
 
-        /// <summary>Run migrations before loading Configuration for the first time. Then load and return Configuration</summary>
-        public static Configuration RunPreConfigMigrations()
+		/// <summary>Run migrations before loading Configuration for the first time. Then load and return Configuration</summary>
+		public static Configuration RunPreConfigMigrations()
 		{
 			// must occur before access to Configuration instance
 			// // outdated. kept here as an example of what belongs in this area
 			// // Migrations.migrate_to_v5_2_0__pre_config();
 
+			Configuration.SetLibationVersion(BuildVersion);
+
 			//***********************************************//
 			//                                               //
 			//   do not use Configuration before this line   //

Source/ApplicationServices/LibraryCommands.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Text;
 using System.Threading.Tasks;
 using AudibleApi;
 using AudibleUtilities;
@@ -242,18 +243,16 @@ namespace ApplicationServices
         #endregion
 
         #region remove/restore books
-        public static Task<int> RemoveBooksAsync(List<string> idsToRemove) => Task.Run(() => removeBooks(idsToRemove));
-        public static int RemoveBook(string idToRemove) => removeBooks(new() { idToRemove });
-        private static int removeBooks(List<string> idsToRemove)
+        public static Task<int> RemoveBooksAsync(this IEnumerable<LibraryBook> idsToRemove) => Task.Run(() => removeBooks(idsToRemove));
+        public static int RemoveBook(this LibraryBook idToRemove) => removeBooks(new[] { idToRemove });
+        private static int removeBooks(IEnumerable<LibraryBook> removeLibraryBooks)
         {
             try
             {
-                if (idsToRemove is null || !idsToRemove.Any())
+                if (removeLibraryBooks is null || !removeLibraryBooks.Any())
                     return 0;
 
                 using var context = DbContexts.GetContext();
-                var libBooks = context.GetLibrary_Flat_NoTracking();
-                var removeLibraryBooks = libBooks.Where(lb => idsToRemove.Contains(lb.Book.AudibleProductId)).ToList();
 
                 // Attach() NoTracking entities before SaveChanges()
                 foreach (var lb in removeLibraryBooks)
@@ -275,7 +274,7 @@ namespace ApplicationServices
             }
         }
 
-        public static int RestoreBooks(this List<LibraryBook> libraryBooks)
+        public static int RestoreBooks(this IEnumerable<LibraryBook> libraryBooks)
         {
             try
             {
@@ -303,6 +302,31 @@ namespace ApplicationServices
                 throw;
             }
         }
+
+        public static int PermanentlyDeleteBooks(this IEnumerable<LibraryBook> libraryBooks)
+        {
+            try
+            {
+                if (libraryBooks is null || !libraryBooks.Any())
+                    return 0;
+
+                using var context = DbContexts.GetContext();
+
+				context.LibraryBooks.RemoveRange(libraryBooks);
+				context.Books.RemoveRange(libraryBooks.Select(lb => lb.Book));				
+
+                var qtyChanges = context.SaveChanges();
+				if (qtyChanges > 0)
+					finalizeLibrarySizeChange();
+
+				return qtyChanges;
+            }
+            catch (Exception ex)
+            {
+                Log.Logger.Error(ex, "Error restoring books");
+                throw;
+            }
+        }
         #endregion
 
         // call this whenever books are added or removed from library
@@ -346,8 +370,10 @@ namespace ApplicationServices
 
                     if (rating is not null)
                         udi.UpdateRating(rating.OverallRating, rating.PerformanceRating, rating.StoryRating);
-                });
+				});
 
+        public static int UpdateBookStatus(this Book book, LiberatedStatus bookStatus, Version libationVersion)
+            => book.UpdateUserDefinedItem(udi => { udi.BookStatus = bookStatus; udi.SetLastDownloaded(libationVersion); });
         public static int UpdateBookStatus(this Book book, LiberatedStatus bookStatus)
             => book.UpdateUserDefinedItem(udi => udi.BookStatus = bookStatus);
         public static int UpdateBookStatus(this IEnumerable<Book> books, LiberatedStatus bookStatus)
@@ -428,40 +454,74 @@ namespace ApplicationServices
 
         // below are queries, not commands. maybe I should make a LibraryQueries. except there's already one of those...
 
-        public record LibraryStats(int booksFullyBackedUp, int booksDownloadedOnly, int booksNoProgress, int booksError, int pdfsDownloaded, int pdfsNotDownloaded)
+        public record LibraryStats(int booksFullyBackedUp, int booksDownloadedOnly, int booksNoProgress, int booksError, int booksUnavailable, int pdfsDownloaded, int pdfsNotDownloaded, int pdfsUnavailable)
         {
             public int PendingBooks => booksNoProgress + booksDownloadedOnly;
             public bool HasPendingBooks => PendingBooks > 0;
 
-            public bool HasBookResults => 0 < (booksFullyBackedUp + booksDownloadedOnly + booksNoProgress + booksError);
-            public bool HasPdfResults => 0 < (pdfsNotDownloaded + pdfsDownloaded);
-        }
-        public static LibraryStats GetCounts()
+            public bool HasBookResults => 0 < (booksFullyBackedUp + booksDownloadedOnly + booksNoProgress + booksError + booksUnavailable);
+            public bool HasPdfResults => 0 < (pdfsNotDownloaded + pdfsDownloaded + pdfsUnavailable);
+
+			public string StatusString => HasPdfResults ? $"{toBookStatusString()}  |  {toPdfStatusString()}" : toBookStatusString();
+
+			private string toBookStatusString()
+			{
+                if (!HasBookResults) return "No books. Begin by importing your library";
+
+                if (!HasPendingBooks && booksError + booksUnavailable == 0) return $"All {"book".PluralizeWithCount(booksFullyBackedUp)} backed up";
+
+				var sb = new StringBuilder($"BACKUPS: No progress: {booksNoProgress}  In process: {booksDownloadedOnly}  Fully backed up: {booksFullyBackedUp}");
+
+                if (booksError > 0)
+                    sb.Append($"  Errors: {booksError}");
+                if (booksUnavailable > 0)
+					sb.Append($"  Unavailable: {booksUnavailable}");
+
+				return sb.ToString();
+			}
+
+			private string toPdfStatusString()
+            {
+                if (pdfsNotDownloaded + pdfsUnavailable == 0) return $"All {pdfsDownloaded} PDFs downloaded";
+
+                var sb = new StringBuilder($"PDFs: NOT d/l'ed: {pdfsNotDownloaded}  Downloaded: {pdfsDownloaded}");
+
+                if (pdfsUnavailable > 0)
+					sb.Append($"  Unavailable: {pdfsUnavailable}");
+
+                return sb.ToString();
+			}
+		}
+        public static LibraryStats GetCounts(IEnumerable<LibraryBook> libraryBooks = null)
         {
-            var libraryBooks = DbContexts.GetLibrary_Flat_NoTracking();
+            libraryBooks ??= DbContexts.GetLibrary_Flat_NoTracking();
 
             var results = libraryBooks
                 .AsParallel()
-                .Select(lb => Liberated_Status(lb.Book))
+                .Select(lb => new { absent = lb.AbsentFromLastScan, status = Liberated_Status(lb.Book) })
                 .ToList();
-            var booksFullyBackedUp = results.Count(r => r == LiberatedStatus.Liberated);
-            var booksDownloadedOnly = results.Count(r => r == LiberatedStatus.PartialDownload);
-            var booksNoProgress = results.Count(r => r == LiberatedStatus.NotLiberated);
-            var booksError = results.Count(r => r == LiberatedStatus.Error);
 
-            Log.Logger.Information("Book counts. {@DebugInfo}", new { total = results.Count, booksFullyBackedUp, booksDownloadedOnly, booksNoProgress, booksError });
+            var booksFullyBackedUp = results.Count(r => r.status == LiberatedStatus.Liberated);
+            var booksDownloadedOnly = results.Count(r => !r.absent && r.status == LiberatedStatus.PartialDownload);
+            var booksNoProgress = results.Count(r => !r.absent && r.status == LiberatedStatus.NotLiberated);
+            var booksError = results.Count(r => r.status == LiberatedStatus.Error);
+            var booksUnavailable = results.Count(r => r.absent && r.status is LiberatedStatus.NotLiberated or LiberatedStatus.PartialDownload);
 
-            var boolResults = libraryBooks
+			Log.Logger.Information("Book counts. {@DebugInfo}", new { total = results.Count, booksFullyBackedUp, booksDownloadedOnly, booksNoProgress, booksError, booksUnavailable });
+
+            var pdfResults = libraryBooks
                 .AsParallel()
                 .Where(lb => lb.Book.HasPdf())
-                .Select(lb => Pdf_Status(lb.Book))
+                .Select(lb => new { absent = lb.AbsentFromLastScan, status = Pdf_Status(lb.Book) })
                 .ToList();
-            var pdfsDownloaded = boolResults.Count(r => r == LiberatedStatus.Liberated);
-            var pdfsNotDownloaded = boolResults.Count(r => r == LiberatedStatus.NotLiberated);
 
-            Log.Logger.Information("PDF counts. {@DebugInfo}", new { total = boolResults.Count, pdfsDownloaded, pdfsNotDownloaded });
+            var pdfsDownloaded = pdfResults.Count(r => r.status == LiberatedStatus.Liberated);
+            var pdfsNotDownloaded = pdfResults.Count(r => !r.absent && r.status == LiberatedStatus.NotLiberated);
+            var pdfsUnavailable = pdfResults.Count(r => r.absent && r.status == LiberatedStatus.NotLiberated);
 
-            return new(booksFullyBackedUp, booksDownloadedOnly, booksNoProgress, booksError, pdfsDownloaded, pdfsNotDownloaded);
+			Log.Logger.Information("PDF counts. {@DebugInfo}", new { total = pdfResults.Count, pdfsDownloaded, pdfsNotDownloaded, pdfsUnavailable });
+
+            return new(booksFullyBackedUp, booksDownloadedOnly, booksNoProgress, booksError, booksUnavailable, pdfsDownloaded, pdfsNotDownloaded, pdfsUnavailable);
         }
     }
 }

Source/ApplicationServices/LibraryExporter.cs

@@ -106,6 +106,12 @@ namespace ApplicationServices
 
 		[Name("Language")]
         public string Language { get; set; }
+
+		[Name("LastDownloaded")]
+		public DateTime? LastDownloaded { get; set; }
+
+		[Name("LastDownloadedVersion")]
+        public string LastDownloadedVersion { get; set; }
     }
 	public static class LibToDtos
 	{
@@ -140,7 +146,10 @@ namespace ApplicationServices
 				PdfStatus = a.Book.UserDefinedItem.PdfStatus.ToString(),
 				ContentType = a.Book.ContentType.ToString(),
 				AudioFormat = a.Book.AudioFormat.ToString(),
-				Language = a.Book.Language
+				Language = a.Book.Language,
+				LastDownloaded = a.Book.UserDefinedItem.LastDownloaded,
+				LastDownloadedVersion = a.Book.UserDefinedItem.LastDownloadedVersion?.ToString() ?? "",
+
 			}).ToList();
 	}
 	public static class LibraryExporter
@@ -212,7 +221,9 @@ namespace ApplicationServices
 				nameof(ExportDto.PdfStatus),
 				nameof(ExportDto.ContentType),
 				nameof(ExportDto.AudioFormat),
-                nameof(ExportDto.Language)
+                nameof(ExportDto.Language),
+                nameof(ExportDto.LastDownloaded),
+                nameof(ExportDto.LastDownloadedVersion),
             };
 			var col = 0;
 			foreach (var c in columns)
@@ -238,9 +249,9 @@ namespace ApplicationServices
 
 				row.CreateCell(col++).SetCellValue(dto.Account);
 
-				var dateAddedCell = row.CreateCell(col++);
-				dateAddedCell.CellStyle = dateStyle;
-				dateAddedCell.SetCellValue(dto.DateAdded);
+				var dateCell = row.CreateCell(col++);
+				dateCell.CellStyle = dateStyle;
+				dateCell.SetCellValue(dto.DateAdded);
 
 				row.CreateCell(col++).SetCellValue(dto.AudibleProductId);
 				row.CreateCell(col++).SetCellValue(dto.Locale);
@@ -281,6 +292,15 @@ namespace ApplicationServices
                 row.CreateCell(col++).SetCellValue(dto.AudioFormat);
                 row.CreateCell(col++).SetCellValue(dto.Language);
 
+				if (dto.LastDownloaded.HasValue)
+				{
+					dateCell = row.CreateCell(col);
+					dateCell.CellStyle = dateStyle;
+					dateCell.SetCellValue(dto.LastDownloaded.Value);
+				}
+
+                row.CreateCell(++col).SetCellValue(dto.LastDownloadedVersion);
+
                 rowIndex++;
 			}
 

Source/AudibleUtilities/ApiExtended.cs

@@ -2,8 +2,9 @@
 using System.Collections.Generic;
 using System.Globalization;
 using System.Linq;
-using System.Threading;
+using System.Threading.Channels;
 using System.Threading.Tasks;
+using System.Diagnostics;
 using AudibleApi;
 using AudibleApi.Common;
 using Dinah.Core;
@@ -19,6 +20,9 @@ namespace AudibleUtilities
 	{
 		public Api Api { get; private set; }
 
+		private const int MaxConcurrency = 10;
+		private const int BatchSize = 50;
+
 		private ApiExtended(Api api) => Api = api;
 
 		/// <summary>Get api from existing tokens else login with 'eager' choice. External browser url is provided. Response can be external browser login or continuing with native api callbacks.</summary>
@@ -39,42 +43,6 @@ namespace AudibleUtilities
 			return new ApiExtended(api);
 		}
 
-		/// <summary>Get api from existing tokens else login with native api callbacks.</summary>
-		public static async Task<ApiExtended> CreateAsync(Account account, ILoginCallback loginCallback)
-		{
-			Serilog.Log.Logger.Information("{@DebugInfo}", new
-			{
-				LoginType = nameof(ILoginCallback),
-				Account = account?.MaskedLogEntry ?? "[null]",
-				LocaleName = account?.Locale?.Name
-			});
-
-			var api = await EzApiCreator.GetApiAsync(
-				loginCallback,
-				account.Locale,
-				AudibleApiStorage.AccountsSettingsFile,
-				account.GetIdentityTokensJsonPath());
-			return new ApiExtended(api);
-		}
-
-		/// <summary>Get api from existing tokens else login with external browser</summary>
-		public static async Task<ApiExtended> CreateAsync(Account account, ILoginExternal loginExternal)
-		{
-			Serilog.Log.Logger.Information("{@DebugInfo}", new
-			{
-				LoginType = nameof(ILoginExternal),
-				Account = account?.MaskedLogEntry ?? "[null]",
-				LocaleName = account?.Locale?.Name
-			});
-
-			var api = await EzApiCreator.GetApiAsync(
-				loginExternal,
-				account.Locale,
-				AudibleApiStorage.AccountsSettingsFile,
-				account.GetIdentityTokensJsonPath());
-			return new ApiExtended(api);
-		}
-
 		/// <summary>Get api from existing tokens. Assumes you have valid login tokens. Else exception</summary>
 		public static async Task<ApiExtended> CreateAsync(Account account)
 		{
@@ -121,35 +89,51 @@ namespace AudibleUtilities
 
 		private async Task<List<Item>> getItemsAsync(LibraryOptions libraryOptions, bool importEpisodes)
 		{
-			var items = new List<Item>();
-
 			Serilog.Log.Logger.Debug("Beginning library scan.");
 
-			List<Task<List<Item>>> getChildEpisodesTasks = new();
+			int count = 0;
+			List<Item> items = new();
+			List<Item> seriesItems = new();
 
-			int count = 0, maxConcurrentEpisodeScans = 5;
-			using SemaphoreSlim concurrencySemaphore = new(maxConcurrentEpisodeScans);
+			var sw = Stopwatch.StartNew();
 
-			await foreach (var item in Api.GetLibraryItemAsyncEnumerable(libraryOptions))
+			//Scan the library for all added books, and add any episode-type items to seriesItems to be scanned for episodes/parents
+			await foreach (var item in Api.GetLibraryItemAsyncEnumerable(libraryOptions, BatchSize, MaxConcurrency))
 			{
 				if ((item.IsEpisodes || item.IsSeriesParent) && importEpisodes)
-				{
-					//Get child episodes asynchronously and await all at the end
-					getChildEpisodesTasks.Add(getChildEpisodesAsync(concurrencySemaphore, item));
-				}
+					seriesItems.Add(item);
 				else if (!item.IsEpisodes && !item.IsSeriesParent)
 					items.Add(item);
 
 				count++;
 			}
 
-			Serilog.Log.Logger.Debug("Library scan complete. Found {count} books and series. Waiting on {getChildEpisodesTasksCount} series episode scans to complete.", count, getChildEpisodesTasks.Count);
+			Serilog.Log.Logger.Debug("Library scan complete. Found {count} books and series. Waiting on series episode scans to complete.", count);
+			Serilog.Log.Logger.Debug("Beginning episode scan.");
 
-			//await and add all episodes from all parents
-			foreach (var epList in await Task.WhenAll(getChildEpisodesTasks))
-				items.AddRange(epList);
+			count = 0;
 
-			Serilog.Log.Logger.Debug("Completed library scan.");
+			//'get' Tasks are activated when they are written to the channel. To avoid more concurrency than is desired, the
+			//channel is bounded with a capacity of 1. Channel write operations are blocked until the current item is read
+			var episodeChannel = Channel.CreateBounded<Task<List<Item>>>(new BoundedChannelOptions(1) { SingleReader = true });
+
+			//Start scanning for all episodes. Episode batch 'get' Tasks are written to the channel.
+			var scanAllSeriesTask = scanAllSeries(seriesItems, episodeChannel.Writer);
+
+			//Read all episodes from the channel and add them to the import items.
+			//This method blocks until episodeChannel.Writer is closed by scanAllSeries()
+			await foreach (var ep in getAllEpisodesAsync(episodeChannel.Reader))
+			{
+				items.AddRange(ep);
+				count += ep.Count;
+			}
+
+			//Be sure to await the scanAllSeries Task so that any exceptions are thrown
+			await scanAllSeriesTask;
+
+			sw.Stop();
+			Serilog.Log.Logger.Debug("Episode scan complete. Found {count} episodes and series.", count);
+			Serilog.Log.Logger.Debug($"Completed library scan in {sw.Elapsed.TotalMilliseconds:F0} ms.");
 
 #if DEBUG
 			//// this will not work for multi accounts
@@ -182,165 +166,178 @@ namespace AudibleUtilities
 
 		#region episodes and podcasts
 
-		private async Task<List<Item>> getChildEpisodesAsync(SemaphoreSlim concurrencySemaphore, Item parent)
+		/// <summary>
+		/// Read get tasks from the <paramref name="channel"/> and await results. This method maintains
+		/// a list of up to <see cref="MaxConcurrency"/> get tasks. When any of the get tasks completes,
+		/// the Items are yielded, that task is removed from the list, and a new get task is read from
+		/// the channel.
+		/// </summary>
+		private async IAsyncEnumerable<List<Item>> getAllEpisodesAsync(ChannelReader<Task<List<Item>>> channel)
 		{
-			await concurrencySemaphore.WaitAsync();
+			List<Task<List<Item>>> concurentGets = new();
 
+			for (int i = 0; i < MaxConcurrency && await channel.WaitToReadAsync(); i++)
+				concurentGets.Add(await channel.ReadAsync());
+
+			while (concurentGets.Count > 0)
+			{
+				var completed = await Task.WhenAny(concurentGets);
+				concurentGets.Remove(completed);
+
+				if (await channel.WaitToReadAsync())
+					concurentGets.Add(await channel.ReadAsync());
+
+				yield return completed.Result;
+			}
+		}
+
+		/// <summary>
+		/// Gets all child episodes and episode parents belonging to <paramref name="seriesItems"/> in batches and
+		/// writes the get tasks to <paramref name="channel"/>.
+		/// </summary>
+		private async Task scanAllSeries(IEnumerable<Item> seriesItems, ChannelWriter<Task<List<Item>>> channel)
+		{
 			try
 			{
-				Serilog.Log.Logger.Debug("Beginning episode scan for {parent}", parent);
+				List<Task> episodeScanTasks = new();
 
-				List<Item> children;
-
-				if (parent.IsEpisodes)
+				foreach (var item in seriesItems)
 				{
-					//The 'parent' is a single episode that was added to the library.
-					//Get the episode's parent and add it to the database.
+					if (item.IsEpisodes)
+						await channel.WriteAsync(getEpisodeParentAsync(item));
+					else if (item.IsSeriesParent)
+						episodeScanTasks.Add(getParentEpisodesAsync(item, channel));
+				}
 
-					Serilog.Log.Logger.Debug("Supplied Parent is an episode. Beginning parent scan for {parent}", parent);
+				//episodeScanTasks complete only after all episode batch 'gets' have been written to the channel
+				await Task.WhenAll(episodeScanTasks);
+			}
+			finally { channel.Complete(); }
+		}
 
-					children = new() { parent };
+		private async Task<List<Item>> getEpisodeParentAsync(Item episode)
+		{
+			//Item is a single episode that was added to the library.
+			//Get the episode's parent and add it to the database.
 
-					var parentAsins = parent.Relationships
-						.Where(r => r.RelationshipToProduct == RelationshipToProduct.Parent)
-						.Select(p => p.Asin);
+			Serilog.Log.Logger.Debug("Supplied Parent is an episode. Beginning parent scan for {parent}", episode);
 
-					var seriesParents = await Api.GetCatalogProductsAsync(parentAsins, CatalogOptions.ResponseGroupOptions.ALL_OPTIONS);
+			List<Item> children = new() { episode };
 
-					int numSeriesParents = seriesParents.Count(p => p.IsSeriesParent);
-					if (numSeriesParents != 1)
-					{
-						//There should only ever be 1 top-level parent per episode. If not, log
-						//so we can figure out what to do about those special cases, and don't
-						//import the episode.
-						JsonSerializerSettings Settings = new()
-						{
-							MetadataPropertyHandling = MetadataPropertyHandling.Ignore,
-							DateParseHandling = DateParseHandling.None,
-							Converters =
-							{
-								new IsoDateTimeConverter { DateTimeStyles = DateTimeStyles.AssumeUniversal }
-							},
-						};
-						Serilog.Log.Logger.Error($"Found {numSeriesParents} parents for {parent.Asin}\r\nEpisode Product:\r\n{JsonConvert.SerializeObject(parent, Formatting.None, Settings)}");
-						return new List<Item>();
+			var parentAsins = episode.Relationships
+				.Where(r => r.RelationshipToProduct == RelationshipToProduct.Parent)
+				.Select(p => p.Asin);
+
+			var seriesParents = await Api.GetCatalogProductsAsync(parentAsins, CatalogOptions.ResponseGroupOptions.ALL_OPTIONS);
+
+			int numSeriesParents = seriesParents.Count(p => p.IsSeriesParent);
+			if (numSeriesParents != 1)
+			{
+				//There should only ever be 1 top-level parent per episode. If not, log
+				//so we can figure out what to do about those special cases, and don't
+				//import the episode.
+				JsonSerializerSettings Settings = new()
+				{
+					MetadataPropertyHandling = MetadataPropertyHandling.Ignore,
+					DateParseHandling = DateParseHandling.None,
+					Converters = {
+						new IsoDateTimeConverter { DateTimeStyles = DateTimeStyles.AssumeUniversal }
 					}
+				};
+				Serilog.Log.Logger.Error($"Found {numSeriesParents} parents for {episode.Asin}\r\nEpisode Product:\r\n{JsonConvert.SerializeObject(episode, Formatting.None, Settings)}");
+				return new();
+			}
 
-					var realParent = seriesParents.Single(p => p.IsSeriesParent);
-					realParent.PurchaseDate = parent.PurchaseDate;
+			var parent = seriesParents.Single(p => p.IsSeriesParent);
+			parent.PurchaseDate = episode.PurchaseDate;
 
-					Serilog.Log.Logger.Debug("Completed parent scan for {parent}", parent); 
-					parent = realParent;
-				}
-				else
+			setSeries(parent, children);
+			children.Add(parent);
+
+			Serilog.Log.Logger.Debug("Completed parent scan for {episode}", episode);
+
+			return children;
+		}
+
+		/// <summary>
+		/// Gets all episodes belonging to <paramref name="parent"/> in batches of <see cref="BatchSize"/> and writes the batch get tasks to <paramref name="channel"/>
+		/// This method only completes after all episode batch 'gets' have been written to the channel
+		/// </summary>
+		private async Task getParentEpisodesAsync(Item parent, ChannelWriter<Task<List<Item>>> channel)
+		{
+			Serilog.Log.Logger.Debug("Beginning episode scan for {parent}", parent);
+
+			var episodeIds = parent.Relationships
+				.Where(r => r.RelationshipToProduct == RelationshipToProduct.Child && r.RelationshipType == RelationshipType.Episode)
+				.Select(r => r.Asin);
+
+			for (int batchNum = 0; episodeIds.Any(); batchNum++)
+			{
+				var batch = episodeIds.Take(BatchSize);
+
+				await channel.WriteAsync(getEpisodeBatchAsync(batchNum, parent, batch));
+
+				episodeIds = episodeIds.Skip(BatchSize);
+			}
+		}
+
+		private async Task<List<Item>> getEpisodeBatchAsync(int batchNum, Item parent, IEnumerable<string> childrenIds)
+		{
+			try
+			{
+				List<Item> episodeBatch = await Api.GetCatalogProductsAsync(childrenIds, CatalogOptions.ResponseGroupOptions.ALL_OPTIONS);
+
+				setSeries(parent, episodeBatch);
+
+				if (batchNum == 0)
+					episodeBatch.Add(parent);
+
+				Serilog.Log.Logger.Debug($"Batch {batchNum}: {episodeBatch.Count} results\t({{parent}})", parent);
+
+				return episodeBatch;
+			}
+			catch (Exception ex)
+			{
+				Serilog.Log.Logger.Error(ex, "Error fetching batch of episodes. {@DebugInfo}", new
 				{
-					children = await getEpisodeChildrenAsync(parent);
-					if (!children.Any())
-						return new();
-				}
+					ParentId = parent.Asin,
+					ParentTitle = parent.Title,
+					BatchNumber = batchNum,
+					ChildIdBatch = childrenIds
+				});
+				throw;
+			}
+		}
 
-				//A series parent will always have exactly 1 Series
-				parent.Series = new Series[]
+		private static void setSeries(Item parent, IEnumerable<Item> children)
+		{
+			//A series parent will always have exactly 1 Series
+			parent.Series = new[]
+			{
+				new Series
+				{
+					Asin = parent.Asin,
+					Sequence = "-1",
+					Title = parent.TitleWithSubtitle
+				}
+			};
+
+			foreach (var child in children)
+			{
+				// use parent's 'DateAdded'. DateAdded is just a convenience prop for: PurchaseDate.UtcDateTime
+				child.PurchaseDate = parent.PurchaseDate;
+				// parent is essentially a series
+				child.Series = new[]
 				{
 					new Series
 					{
 						Asin = parent.Asin,
-						Sequence = "-1",
+						// This should properly be Single() not FirstOrDefault(), but FirstOrDefault is defensive for malformed data from audible
+						Sequence = parent.Relationships.FirstOrDefault(r => r.Asin == child.Asin)?.Sort?.ToString() ?? "0",
 						Title = parent.TitleWithSubtitle
 					}
 				};
-
-				foreach (var child in children)
-				{
-					// use parent's 'DateAdded'. DateAdded is just a convenience prop for: PurchaseDate.UtcDateTime
-					child.PurchaseDate = parent.PurchaseDate;
-					// parent is essentially a series
-					child.Series = new Series[]
-					{
-						new Series
-						{
-							Asin = parent.Asin,
-							// This should properly be Single() not FirstOrDefault(), but FirstOrDefault is defensive for malformed data from audible
-							Sequence = parent.Relationships.FirstOrDefault(r => r.Asin == child.Asin)?.Sort?.ToString() ?? "0",
-							Title = parent.TitleWithSubtitle
-						}
-					};
-				}
-
-				children.Add(parent);
-
-				Serilog.Log.Logger.Debug("Completed episode scan for {parent}", parent);
-
-				return children;
 			}
-			finally
-			{
-				concurrencySemaphore.Release();
-			}
-		}
-
-		private async Task<List<Item>> getEpisodeChildrenAsync(Item parent)
-		{
-			var childrenIds = parent.Relationships
-				.Where(r => r.RelationshipToProduct == RelationshipToProduct.Child && r.RelationshipType == RelationshipType.Episode)
-				.Select(r => r.Asin)
-				.ToList();
-
-			// fetch children in batches
-			const int batchSize = 20;
-
-			var results = new List<Item>();
-
-			for (var i = 1; ; i++)
-			{
-				var idBatch = childrenIds.Skip((i - 1) * batchSize).Take(batchSize).ToList();
-				if (!idBatch.Any())
-					break;
-
-				List<Item> childrenBatch;
-				try
-				{
-					childrenBatch = await Api.GetCatalogProductsAsync(idBatch, CatalogOptions.ResponseGroupOptions.ALL_OPTIONS);
-#if DEBUG
-					//var childrenBatchDebug = childrenBatch.Select(i => i.ToJson()).Aggregate((a, b) => $"{a}\r\n\r\n{b}");
-					//System.IO.File.WriteAllText($"children of {parent.Asin}.json", childrenBatchDebug);
-#endif
-				}
-				catch (Exception ex)
-				{
-					Serilog.Log.Logger.Error(ex, "Error fetching batch of episodes. {@DebugInfo}", new
-					{
-						ParentId = parent.Asin,
-						ParentTitle = parent.Title,
-						BatchNumber = i,
-						ChildIdBatch = idBatch
-					});
-					throw;
-				}
-
-				Serilog.Log.Logger.Debug($"Batch {i}: {childrenBatch.Count} results\t({{parent}})", parent);
-				// the service returned no results. probably indicates an error. stop running batches
-				if (!childrenBatch.Any())
-					break;
-
-				results.AddRange(childrenBatch);
-			}
-
-			Serilog.Log.Logger.Debug("Parent episodes/podcasts series. Children found. {@DebugInfo}", new
-			{
-				ParentId = parent.Asin,
-				ParentTitle = parent.Title,
-				ChildCount = childrenIds.Count
-			});
-
-			if (childrenIds.Count != results.Count)
-			{
-				var ex = new ApplicationException($"Mis-match: Children defined by parent={childrenIds.Count}. Children returned by batches={results.Count}");
-				Serilog.Log.Logger.Error(ex, "{parent} - Quantity of series episodes defined by parent does not match quantity returned by batch fetching.", parent);
-				throw ex;
-			}
-
-			return results;
 		}
 		#endregion
 	}

Source/AudibleUtilities/AudibleUtilities.csproj

@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="AudibleApi" Version="7.3.3.1" />
+    <PackageReference Include="AudibleApi" Version="8.1.0.1" />
   </ItemGroup>
 
   <ItemGroup>

Source/AudibleUtilities/Mkb79Auth.cs

@@ -4,6 +4,7 @@ using System.Linq;
 using System.Threading.Tasks;
 using AudibleApi;
 using AudibleApi.Authorization;
+using AudibleApi.Cryptography;
 using Dinah.Core;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
@@ -178,7 +179,7 @@ namespace AudibleUtilities
 				LocaleCode = account.Locale.CountryCode,
 				RefreshToken = account.IdentityTokens.RefreshToken.Value,				
 				StoreAuthenticationCookie = account.IdentityTokens.StoreAuthenticationCookie,
-				WebsiteCookies = new(account.IdentityTokens.Cookies.ToKeyValuePair()),
+				WebsiteCookies = new(account.IdentityTokens.Cookies),
 			};
 	}
 

Source/DataLayer/Configurations/BookConfig.cs

@@ -1,5 +1,6 @@
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using System;
 
 namespace DataLayer.Configurations
 {
@@ -19,40 +20,45 @@ namespace DataLayer.Configurations
             entity.Ignore(nameof(Book.Authors));
             entity.Ignore(nameof(Book.Narrators));
             entity.Ignore(nameof(Book.AudioFormat));
-			//// these don't seem to matter
-			//entity.Ignore(nameof(Book.AuthorNames));
-			//entity.Ignore(nameof(Book.NarratorNames));
-			//entity.Ignore(nameof(Book.HasPdfs));
+            //// these don't seem to matter
+            //entity.Ignore(nameof(Book.AuthorNames));
+            //entity.Ignore(nameof(Book.NarratorNames));
+            //entity.Ignore(nameof(Book.HasPdfs));
 
-			// OwnsMany: "Can only ever appear on navigation properties of other entity types.
-			//  Are automatically loaded, and can only be tracked by a DbContext alongside their owner."
-			entity
-				.OwnsMany(b => b.Supplements, b_s =>
-				{
-					b_s.WithOwner(s => s.Book)
-						.HasForeignKey(s => s.BookId);
-					b_s.HasKey(s => s.SupplementId);
-				});
+            // OwnsMany: "Can only ever appear on navigation properties of other entity types.
+            //  Are automatically loaded, and can only be tracked by a DbContext alongside their owner."
+            entity
+                .OwnsMany(b => b.Supplements, b_s =>
+                {
+                    b_s.WithOwner(s => s.Book)
+                        .HasForeignKey(s => s.BookId);
+                    b_s.HasKey(s => s.SupplementId);
+                });
             // even though it's owned, we need to map its backing field
             entity
                 .Metadata
                 .FindNavigation(nameof(Book.Supplements))
                 .SetPropertyAccessMode(PropertyAccessMode.Field);
 
-			// owns it 1:1, store in separate table
-			entity
-				.OwnsOne(b => b.UserDefinedItem, b_udi =>
-				{
-					b_udi.WithOwner(udi => udi.Book)
-						.HasForeignKey(udi => udi.BookId);
-					b_udi.Property(udi => udi.BookId).ValueGeneratedNever();
-					b_udi.ToTable(nameof(Book.UserDefinedItem));
+            // owns it 1:1, store in separate table
+            entity
+                .OwnsOne(b => b.UserDefinedItem, b_udi =>
+                {
+                    b_udi.WithOwner(udi => udi.Book)
+                        .HasForeignKey(udi => udi.BookId);
+                    b_udi.Property(udi => udi.BookId).ValueGeneratedNever();
+                    b_udi.ToTable(nameof(Book.UserDefinedItem));
 
-					// owns it 1:1, store in same table
-					b_udi.OwnsOne(udi => udi.Rating);
-				});
+                    b_udi.Property(udi => udi.LastDownloaded);
+                    b_udi
+                        .Property(udi => udi.LastDownloadedVersion)
+                        .HasConversion(ver => ver.ToString(), str => Version.Parse(str));
 
-			entity
+                    // owns it 1:1, store in same table
+                    b_udi.OwnsOne(udi => udi.Rating);
+                });
+
+            entity
                 .Metadata
                 .FindNavigation(nameof(Book.ContributorsLink))
                 // PropertyAccessMode.Field : Contributions is a get-only property, not a field, so use its backing field
@@ -68,6 +74,6 @@ namespace DataLayer.Configurations
                 .HasOne(b => b.Category)
                 .WithMany()
                 .HasForeignKey(b => b.CategoryId);
-		}
+        }
     }
 }

Source/DataLayer/EfClasses/LibraryBook.cs

@@ -12,6 +12,7 @@ namespace DataLayer
         public string Account { get; private set; }
 
         public bool IsDeleted { get; set; }
+        public bool AbsentFromLastScan { get; set; }
 
         private LibraryBook() { }
         public LibraryBook(Book book, DateTime dateAdded, string account)

Source/DataLayer/EfClasses/UserDefinedItem.cs

@@ -24,8 +24,27 @@ namespace DataLayer
     {
         internal int BookId { get; private set; }
         public Book Book { get; private set; }
+        public DateTime? LastDownloaded { get; private set; }
+        public Version LastDownloadedVersion { get; private set; }
 
-        private UserDefinedItem() { }
+        public void SetLastDownloaded(Version version)
+        {
+            if (LastDownloadedVersion != version)
+            {
+                LastDownloadedVersion = version;
+				OnItemChanged(nameof(LastDownloadedVersion));
+			}
+
+            if (version is null)
+                LastDownloaded = null;
+            else
+            {
+				LastDownloaded = DateTime.Now;
+                OnItemChanged(nameof(LastDownloaded));
+			}
+		}
+
+		private UserDefinedItem() { }
         internal UserDefinedItem(Book book)
 		{
 			ArgumentValidator.EnsureNotNull(book, nameof(book));

Source/DataLayer/Migrations/20230302220539_AddLastDownloadedInfo.Designer.cs

@@ -0,0 +1,410 @@
+// <auto-generated />
+using System;
+using DataLayer;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace DataLayer.Migrations
+{
+    [DbContext(typeof(LibationContext))]
+    [Migration("20230302220539_AddLastDownloadedInfo")]
+    partial class AddLastDownloadedInfo
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder.HasAnnotation("ProductVersion", "7.0.3");
+
+            modelBuilder.Entity("DataLayer.Book", b =>
+                {
+                    b.Property<int>("BookId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("AudibleProductId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("CategoryId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("ContentType")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTime?>("DatePublished")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Description")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("IsAbridged")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Language")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("LengthInMinutes")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Locale")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PictureId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PictureLarge")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Title")
+                        .HasColumnType("TEXT");
+
+                    b.Property<long>("_audioFormat")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("BookId");
+
+                    b.HasIndex("AudibleProductId");
+
+                    b.HasIndex("CategoryId");
+
+                    b.ToTable("Books");
+                });
+
+            modelBuilder.Entity("DataLayer.BookContributor", b =>
+                {
+                    b.Property<int>("BookId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("ContributorId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("Role")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<byte>("Order")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("BookId", "ContributorId", "Role");
+
+                    b.HasIndex("BookId");
+
+                    b.HasIndex("ContributorId");
+
+                    b.ToTable("BookContributor");
+                });
+
+            modelBuilder.Entity("DataLayer.Category", b =>
+                {
+                    b.Property<int>("CategoryId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("AudibleCategoryId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int?>("ParentCategoryCategoryId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("CategoryId");
+
+                    b.HasIndex("AudibleCategoryId");
+
+                    b.HasIndex("ParentCategoryCategoryId");
+
+                    b.ToTable("Categories");
+
+                    b.HasData(
+                        new
+                        {
+                            CategoryId = -1,
+                            AudibleCategoryId = "",
+                            Name = ""
+                        });
+                });
+
+            modelBuilder.Entity("DataLayer.Contributor", b =>
+                {
+                    b.Property<int>("ContributorId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("AudibleContributorId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("ContributorId");
+
+                    b.HasIndex("Name");
+
+                    b.ToTable("Contributors");
+
+                    b.HasData(
+                        new
+                        {
+                            ContributorId = -1,
+                            Name = ""
+                        });
+                });
+
+            modelBuilder.Entity("DataLayer.LibraryBook", b =>
+                {
+                    b.Property<int>("BookId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Account")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("DateAdded")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("BookId");
+
+                    b.ToTable("LibraryBooks");
+                });
+
+            modelBuilder.Entity("DataLayer.Series", b =>
+                {
+                    b.Property<int>("SeriesId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("AudibleSeriesId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("SeriesId");
+
+                    b.HasIndex("AudibleSeriesId");
+
+                    b.ToTable("Series");
+                });
+
+            modelBuilder.Entity("DataLayer.SeriesBook", b =>
+                {
+                    b.Property<int>("SeriesId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("BookId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Order")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("SeriesId", "BookId");
+
+                    b.HasIndex("BookId");
+
+                    b.HasIndex("SeriesId");
+
+                    b.ToTable("SeriesBook");
+                });
+
+            modelBuilder.Entity("DataLayer.Book", b =>
+                {
+                    b.HasOne("DataLayer.Category", "Category")
+                        .WithMany()
+                        .HasForeignKey("CategoryId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.OwnsOne("DataLayer.Rating", "Rating", b1 =>
+                        {
+                            b1.Property<int>("BookId")
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<float>("OverallRating")
+                                .HasColumnType("REAL");
+
+                            b1.Property<float>("PerformanceRating")
+                                .HasColumnType("REAL");
+
+                            b1.Property<float>("StoryRating")
+                                .HasColumnType("REAL");
+
+                            b1.HasKey("BookId");
+
+                            b1.ToTable("Books");
+
+                            b1.WithOwner()
+                                .HasForeignKey("BookId");
+                        });
+
+                    b.OwnsMany("DataLayer.Supplement", "Supplements", b1 =>
+                        {
+                            b1.Property<int>("SupplementId")
+                                .ValueGeneratedOnAdd()
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<int>("BookId")
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<string>("Url")
+                                .HasColumnType("TEXT");
+
+                            b1.HasKey("SupplementId");
+
+                            b1.HasIndex("BookId");
+
+                            b1.ToTable("Supplement");
+
+                            b1.WithOwner("Book")
+                                .HasForeignKey("BookId");
+
+                            b1.Navigation("Book");
+                        });
+
+                    b.OwnsOne("DataLayer.UserDefinedItem", "UserDefinedItem", b1 =>
+                        {
+                            b1.Property<int>("BookId")
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<int>("BookStatus")
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<DateTime?>("LastDownloaded")
+                                .HasColumnType("TEXT");
+
+                            b1.Property<string>("LastDownloadedVersion")
+                                .HasColumnType("TEXT");
+
+                            b1.Property<int?>("PdfStatus")
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<string>("Tags")
+                                .HasColumnType("TEXT");
+
+                            b1.HasKey("BookId");
+
+                            b1.ToTable("UserDefinedItem", (string)null);
+
+                            b1.WithOwner("Book")
+                                .HasForeignKey("BookId");
+
+                            b1.OwnsOne("DataLayer.Rating", "Rating", b2 =>
+                                {
+                                    b2.Property<int>("UserDefinedItemBookId")
+                                        .HasColumnType("INTEGER");
+
+                                    b2.Property<float>("OverallRating")
+                                        .HasColumnType("REAL");
+
+                                    b2.Property<float>("PerformanceRating")
+                                        .HasColumnType("REAL");
+
+                                    b2.Property<float>("StoryRating")
+                                        .HasColumnType("REAL");
+
+                                    b2.HasKey("UserDefinedItemBookId");
+
+                                    b2.ToTable("UserDefinedItem");
+
+                                    b2.WithOwner()
+                                        .HasForeignKey("UserDefinedItemBookId");
+                                });
+
+                            b1.Navigation("Book");
+
+                            b1.Navigation("Rating");
+                        });
+
+                    b.Navigation("Category");
+
+                    b.Navigation("Rating");
+
+                    b.Navigation("Supplements");
+
+                    b.Navigation("UserDefinedItem");
+                });
+
+            modelBuilder.Entity("DataLayer.BookContributor", b =>
+                {
+                    b.HasOne("DataLayer.Book", "Book")
+                        .WithMany("ContributorsLink")
+                        .HasForeignKey("BookId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("DataLayer.Contributor", "Contributor")
+                        .WithMany("BooksLink")
+                        .HasForeignKey("ContributorId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Book");
+
+                    b.Navigation("Contributor");
+                });
+
+            modelBuilder.Entity("DataLayer.Category", b =>
+                {
+                    b.HasOne("DataLayer.Category", "ParentCategory")
+                        .WithMany()
+                        .HasForeignKey("ParentCategoryCategoryId");
+
+                    b.Navigation("ParentCategory");
+                });
+
+            modelBuilder.Entity("DataLayer.LibraryBook", b =>
+                {
+                    b.HasOne("DataLayer.Book", "Book")
+                        .WithOne()
+                        .HasForeignKey("DataLayer.LibraryBook", "BookId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Book");
+                });
+
+            modelBuilder.Entity("DataLayer.SeriesBook", b =>
+                {
+                    b.HasOne("DataLayer.Book", "Book")
+                        .WithMany("SeriesLink")
+                        .HasForeignKey("BookId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("DataLayer.Series", "Series")
+                        .WithMany("BooksLink")
+                        .HasForeignKey("SeriesId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Book");
+
+                    b.Navigation("Series");
+                });
+
+            modelBuilder.Entity("DataLayer.Book", b =>
+                {
+                    b.Navigation("ContributorsLink");
+
+                    b.Navigation("SeriesLink");
+                });
+
+            modelBuilder.Entity("DataLayer.Contributor", b =>
+                {
+                    b.Navigation("BooksLink");
+                });
+
+            modelBuilder.Entity("DataLayer.Series", b =>
+                {
+                    b.Navigation("BooksLink");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Source/DataLayer/Migrations/20230302220539_AddLastDownloadedInfo.cs

@@ -0,0 +1,39 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace DataLayer.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddLastDownloadedInfo : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<DateTime>(
+                name: "LastDownloaded",
+                table: "UserDefinedItem",
+                type: "TEXT",
+                nullable: true);
+
+            migrationBuilder.AddColumn<string>(
+                name: "LastDownloadedVersion",
+                table: "UserDefinedItem",
+                type: "TEXT",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "LastDownloaded",
+                table: "UserDefinedItem");
+
+            migrationBuilder.DropColumn(
+                name: "LastDownloadedVersion",
+                table: "UserDefinedItem");
+        }
+    }
+}

Source/DataLayer/Migrations/20230308013410_AddAbsentFromLastScan.Designer.cs

@@ -0,0 +1,413 @@
+// <auto-generated />
+using System;
+using DataLayer;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace DataLayer.Migrations
+{
+    [DbContext(typeof(LibationContext))]
+    [Migration("20230308013410_AddAbsentFromLastScan")]
+    partial class AddAbsentFromLastScan
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder.HasAnnotation("ProductVersion", "7.0.3");
+
+            modelBuilder.Entity("DataLayer.Book", b =>
+                {
+                    b.Property<int>("BookId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("AudibleProductId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("CategoryId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("ContentType")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTime?>("DatePublished")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Description")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("IsAbridged")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Language")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("LengthInMinutes")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Locale")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PictureId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PictureLarge")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Title")
+                        .HasColumnType("TEXT");
+
+                    b.Property<long>("_audioFormat")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("BookId");
+
+                    b.HasIndex("AudibleProductId");
+
+                    b.HasIndex("CategoryId");
+
+                    b.ToTable("Books");
+                });
+
+            modelBuilder.Entity("DataLayer.BookContributor", b =>
+                {
+                    b.Property<int>("BookId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("ContributorId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("Role")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<byte>("Order")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("BookId", "ContributorId", "Role");
+
+                    b.HasIndex("BookId");
+
+                    b.HasIndex("ContributorId");
+
+                    b.ToTable("BookContributor");
+                });
+
+            modelBuilder.Entity("DataLayer.Category", b =>
+                {
+                    b.Property<int>("CategoryId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("AudibleCategoryId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int?>("ParentCategoryCategoryId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("CategoryId");
+
+                    b.HasIndex("AudibleCategoryId");
+
+                    b.HasIndex("ParentCategoryCategoryId");
+
+                    b.ToTable("Categories");
+
+                    b.HasData(
+                        new
+                        {
+                            CategoryId = -1,
+                            AudibleCategoryId = "",
+                            Name = ""
+                        });
+                });
+
+            modelBuilder.Entity("DataLayer.Contributor", b =>
+                {
+                    b.Property<int>("ContributorId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("AudibleContributorId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("ContributorId");
+
+                    b.HasIndex("Name");
+
+                    b.ToTable("Contributors");
+
+                    b.HasData(
+                        new
+                        {
+                            ContributorId = -1,
+                            Name = ""
+                        });
+                });
+
+            modelBuilder.Entity("DataLayer.LibraryBook", b =>
+                {
+                    b.Property<int>("BookId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("AbsentFromLastScan")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Account")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("DateAdded")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("BookId");
+
+                    b.ToTable("LibraryBooks");
+                });
+
+            modelBuilder.Entity("DataLayer.Series", b =>
+                {
+                    b.Property<int>("SeriesId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("AudibleSeriesId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("SeriesId");
+
+                    b.HasIndex("AudibleSeriesId");
+
+                    b.ToTable("Series");
+                });
+
+            modelBuilder.Entity("DataLayer.SeriesBook", b =>
+                {
+                    b.Property<int>("SeriesId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("BookId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Order")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("SeriesId", "BookId");
+
+                    b.HasIndex("BookId");
+
+                    b.HasIndex("SeriesId");
+
+                    b.ToTable("SeriesBook");
+                });
+
+            modelBuilder.Entity("DataLayer.Book", b =>
+                {
+                    b.HasOne("DataLayer.Category", "Category")
+                        .WithMany()
+                        .HasForeignKey("CategoryId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.OwnsOne("DataLayer.Rating", "Rating", b1 =>
+                        {
+                            b1.Property<int>("BookId")
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<float>("OverallRating")
+                                .HasColumnType("REAL");
+
+                            b1.Property<float>("PerformanceRating")
+                                .HasColumnType("REAL");
+
+                            b1.Property<float>("StoryRating")
+                                .HasColumnType("REAL");
+
+                            b1.HasKey("BookId");
+
+                            b1.ToTable("Books");
+
+                            b1.WithOwner()
+                                .HasForeignKey("BookId");
+                        });
+
+                    b.OwnsMany("DataLayer.Supplement", "Supplements", b1 =>
+                        {
+                            b1.Property<int>("SupplementId")
+                                .ValueGeneratedOnAdd()
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<int>("BookId")
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<string>("Url")
+                                .HasColumnType("TEXT");
+
+                            b1.HasKey("SupplementId");
+
+                            b1.HasIndex("BookId");
+
+                            b1.ToTable("Supplement");
+
+                            b1.WithOwner("Book")
+                                .HasForeignKey("BookId");
+
+                            b1.Navigation("Book");
+                        });
+
+                    b.OwnsOne("DataLayer.UserDefinedItem", "UserDefinedItem", b1 =>
+                        {
+                            b1.Property<int>("BookId")
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<int>("BookStatus")
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<DateTime?>("LastDownloaded")
+                                .HasColumnType("TEXT");
+
+                            b1.Property<string>("LastDownloadedVersion")
+                                .HasColumnType("TEXT");
+
+                            b1.Property<int?>("PdfStatus")
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<string>("Tags")
+                                .HasColumnType("TEXT");
+
+                            b1.HasKey("BookId");
+
+                            b1.ToTable("UserDefinedItem", (string)null);
+
+                            b1.WithOwner("Book")
+                                .HasForeignKey("BookId");
+
+                            b1.OwnsOne("DataLayer.Rating", "Rating", b2 =>
+                                {
+                                    b2.Property<int>("UserDefinedItemBookId")
+                                        .HasColumnType("INTEGER");
+
+                                    b2.Property<float>("OverallRating")
+                                        .HasColumnType("REAL");
+
+                                    b2.Property<float>("PerformanceRating")
+                                        .HasColumnType("REAL");
+
+                                    b2.Property<float>("StoryRating")
+                                        .HasColumnType("REAL");
+
+                                    b2.HasKey("UserDefinedItemBookId");
+
+                                    b2.ToTable("UserDefinedItem");
+
+                                    b2.WithOwner()
+                                        .HasForeignKey("UserDefinedItemBookId");
+                                });
+
+                            b1.Navigation("Book");
+
+                            b1.Navigation("Rating");
+                        });
+
+                    b.Navigation("Category");
+
+                    b.Navigation("Rating");
+
+                    b.Navigation("Supplements");
+
+                    b.Navigation("UserDefinedItem");
+                });
+
+            modelBuilder.Entity("DataLayer.BookContributor", b =>
+                {
+                    b.HasOne("DataLayer.Book", "Book")
+                        .WithMany("ContributorsLink")
+                        .HasForeignKey("BookId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("DataLayer.Contributor", "Contributor")
+                        .WithMany("BooksLink")
+                        .HasForeignKey("ContributorId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Book");
+
+                    b.Navigation("Contributor");
+                });
+
+            modelBuilder.Entity("DataLayer.Category", b =>
+                {
+                    b.HasOne("DataLayer.Category", "ParentCategory")
+                        .WithMany()
+                        .HasForeignKey("ParentCategoryCategoryId");
+
+                    b.Navigation("ParentCategory");
+                });
+
+            modelBuilder.Entity("DataLayer.LibraryBook", b =>
+                {
+                    b.HasOne("DataLayer.Book", "Book")
+                        .WithOne()
+                        .HasForeignKey("DataLayer.LibraryBook", "BookId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Book");
+                });
+
+            modelBuilder.Entity("DataLayer.SeriesBook", b =>
+                {
+                    b.HasOne("DataLayer.Book", "Book")
+                        .WithMany("SeriesLink")
+                        .HasForeignKey("BookId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("DataLayer.Series", "Series")
+                        .WithMany("BooksLink")
+                        .HasForeignKey("SeriesId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Book");
+
+                    b.Navigation("Series");
+                });
+
+            modelBuilder.Entity("DataLayer.Book", b =>
+                {
+                    b.Navigation("ContributorsLink");
+
+                    b.Navigation("SeriesLink");
+                });
+
+            modelBuilder.Entity("DataLayer.Contributor", b =>
+                {
+                    b.Navigation("BooksLink");
+                });
+
+            modelBuilder.Entity("DataLayer.Series", b =>
+                {
+                    b.Navigation("BooksLink");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Source/DataLayer/Migrations/20230308013410_AddAbsentFromLastScan.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace DataLayer.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddAbsentFromLastScan : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<bool>(
+                name: "AbsentFromLastScan",
+                table: "LibraryBooks",
+                type: "INTEGER",
+                nullable: false,
+                defaultValue: false);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "AbsentFromLastScan",
+                table: "LibraryBooks");
+        }
+    }
+}

Source/DataLayer/Migrations/LibationContextModelSnapshot.cs

@@ -15,7 +15,7 @@ namespace DataLayer.Migrations
         protected override void BuildModel(ModelBuilder modelBuilder)
         {
 #pragma warning disable 612, 618
-            modelBuilder.HasAnnotation("ProductVersion", "7.0.2");
+            modelBuilder.HasAnnotation("ProductVersion", "7.0.3");
 
             modelBuilder.Entity("DataLayer.Book", b =>
                 {
@@ -157,6 +157,9 @@ namespace DataLayer.Migrations
                     b.Property<int>("BookId")
                         .HasColumnType("INTEGER");
 
+                    b.Property<bool>("AbsentFromLastScan")
+                        .HasColumnType("INTEGER");
+
                     b.Property<string>("Account")
                         .HasColumnType("TEXT");
 
@@ -272,6 +275,12 @@ namespace DataLayer.Migrations
                             b1.Property<int>("BookStatus")
                                 .HasColumnType("INTEGER");
 
+                            b1.Property<DateTime?>("LastDownloaded")
+                                .HasColumnType("TEXT");
+
+                            b1.Property<string>("LastDownloadedVersion")
+                                .HasColumnType("TEXT");
+
                             b1.Property<int?>("PdfStatus")
                                 .HasColumnType("INTEGER");
 

Source/DataLayer/QueryObjects/LibraryBookQueries.cs

@@ -107,8 +107,9 @@ namespace DataLayer
             => bookList
                 .Where(
                     lb =>
-                        lb.Book.UserDefinedItem.BookStatus is LiberatedStatus.NotLiberated or LiberatedStatus.PartialDownload
-                        || lb.Book.UserDefinedItem.PdfStatus is LiberatedStatus.NotLiberated or LiberatedStatus.PartialDownload
+                        !lb.AbsentFromLastScan &&
+                        (lb.Book.UserDefinedItem.BookStatus is LiberatedStatus.NotLiberated or LiberatedStatus.PartialDownload
+                        || lb.Book.UserDefinedItem.PdfStatus is LiberatedStatus.NotLiberated or LiberatedStatus.PartialDownload)
                     );
     }
 }

Source/DtoImporterService/ImportItem.cs

@@ -8,5 +8,7 @@ namespace DtoImporterService
 		public Item DtoItem { get; set; }
 		public string AccountId { get; set; }
 		public string LocaleName { get; set; }
+		public override string ToString()
+			=> DtoItem is null ? base.ToString() : $"[{DtoItem.ProductId}] {DtoItem.Title}";
 	}
 }

Source/DtoImporterService/LibraryBookImporter.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Linq;
 using AudibleUtilities;
 using DataLayer;
+using Dinah.Core;
 using Dinah.Core.Collections.Generic;
 
 namespace DtoImporterService
@@ -40,9 +41,8 @@ namespace DtoImporterService
 			//
 			// CURRENT SOLUTION: don't re-insert
 
-			var currentLibraryProductIds = DbContext.LibraryBooks.Select(l => l.Book.AudibleProductId).ToList();
 			var newItems = importItems
-				.Where(dto => !currentLibraryProductIds.Contains(dto.DtoItem.ProductId))
+				.ExceptBy(DbContext.LibraryBooks.Select(lb => lb.Book.AudibleProductId), imp => imp.DtoItem.ProductId)
 				.ToList();
 
 			// if 2 accounts try to import the same book in the same transaction: error since we're only tracking and pulling by asin.
@@ -55,7 +55,11 @@ namespace DtoImporterService
 				var libraryBook = new LibraryBook(
 					bookImporter.Cache[newItem.DtoItem.ProductId],
 					newItem.DtoItem.DateAdded,
-					newItem.AccountId);
+					newItem.AccountId)
+				{
+					AbsentFromLastScan = isPlusTitleUnavailable(newItem)
+				};
+
 				try
 				{
 					DbContext.LibraryBooks.Add(libraryBook);
@@ -66,8 +70,30 @@ namespace DtoImporterService
 				}
 			}
 
+			//If an existing Book wasn't found in the import, the owning LibraryBook's Book will be null. 
+			foreach (var nullBook in DbContext.LibraryBooks.AsEnumerable().Where(lb => lb.Book is null))
+				nullBook.AbsentFromLastScan = true;
+
+			//Join importItems on LibraryBooks before iterating over LibraryBooks to avoid
+			//quadratic complexity caused by searching all of importItems for each LibraryBook.
+			//Join uses hashing, so complexity should approach O(N) instead of O(N^2).
+			var items_lbs
+			   = importItems
+			   .Join(DbContext.LibraryBooks, o => (o.AccountId, o.DtoItem.ProductId), i => (i.Account, i.Book?.AudibleProductId), (o, i) => (o, i));
+
+			foreach ((ImportItem item, LibraryBook lb) in items_lbs)
+				lb.AbsentFromLastScan = isPlusTitleUnavailable(item);
+
 			var qtyNew = hash.Count;
 			return qtyNew;
 		}
+
+
+		//This SEEMS to work to detect plus titles which are no longer available.
+		//I have my doubts it won't yield false negatives, but I have more
+		//confidence that it won't yield many/any false positives.
+		private static bool isPlusTitleUnavailable(ImportItem item)
+			=> item.DtoItem.IsAyce is true
+			&& item.DtoItem.Plans?.Any(p => p.PlanName.ContainsInsensitive("Minerva") || p.PlanName.ContainsInsensitive("Free")) is not true;
 	}
 }

Source/FileLiberator/AudioDecodable.cs

@@ -17,10 +17,14 @@ namespace FileLiberator
 
         protected LameConfig GetLameOptions(Configuration config)
         {
-            LameConfig lameConfig = new();
-            lameConfig.Mode = MPEGMode.Mono;
+			LameConfig lameConfig = new()
+			{
+				Mode = MPEGMode.Mono,
+				Quality = config.LameEncoderQuality,
+                OutputSampleRate = (int)config.MaxSampleRate
+			};
 
-            if (config.LameTargetBitrate)
+			if (config.LameTargetBitrate)
             {
                 if (config.LameConstantBitrate)
                     lameConfig.BitRate = config.LameBitrate;

Source/FileLiberator/ConvertToMp3.cs

@@ -103,20 +103,20 @@ namespace FileLiberator
 		{
 			averageSpeed.AddPosition(e.ProcessPosition.TotalSeconds);
 
-			var remainingTimeToProcess = (e.TotalDuration - e.ProcessPosition).TotalSeconds;
+			var remainingTimeToProcess = (e.EndTime - e.ProcessPosition).TotalSeconds;
 			var estTimeRemaining = remainingTimeToProcess / averageSpeed.Average;
 
 			if (double.IsNormal(estTimeRemaining))
 				OnStreamingTimeRemaining(TimeSpan.FromSeconds(estTimeRemaining));
 
-			double progressPercent = 100 * e.ProcessPosition.TotalSeconds / e.TotalDuration.TotalSeconds;
+			double progressPercent = 100 * e.FractionCompleted;
 
 			OnStreamingProgressChanged(
 				new DownloadProgress
 				{
 					ProgressPercentage = progressPercent,
-					BytesReceived = (long)e.ProcessPosition.TotalSeconds,
-					TotalBytesToReceive = (long)e.TotalDuration.TotalSeconds
+					BytesReceived = (long)(e.ProcessPosition - e.StartTime).TotalSeconds,
+					TotalBytesToReceive = (long)(e.EndTime - e.StartTime).TotalSeconds
 				});
 		}
 	}

Source/FileLiberator/DownloadDecryptBook.cs

@@ -41,7 +41,7 @@ namespace FileLiberator
 
             OnBegin(libraryBook);
 
-            try
+			try
             {
                 if (libraryBook.Book.Audio_Exists())
                     return new StatusHandler { "Cannot find decrypt. Final audio file already exists" };
@@ -61,31 +61,30 @@ namespace FileLiberator
                 }
 
                 // decrypt failed
-                if (!success)
+                if (!success || getFirstAudioFile(entries) == default)
                 {
-                    foreach (var tmpFile in entries.Where(f => f.FileType != FileType.AAXC))
-                        FileUtility.SaferDelete(tmpFile.Path);
+                    await Task.WhenAll(
+                        entries
+                        .Where(f => f.FileType != FileType.AAXC)
+                        .Select(f => Task.Run(() => FileUtility.SaferDelete(f.Path))));
 
-                    return abDownloader?.IsCanceled == true ?
-                        new StatusHandler { "Cancelled" } :
-                        new StatusHandler { "Decrypt failed" };
+                    return
+                        abDownloader?.IsCanceled is true
+                        ? new StatusHandler { "Cancelled" }
+                        : new StatusHandler { "Decrypt failed" };
                 }
 
-                // moves new files from temp dir to final dest.
-                // This could take a few seconds if moving hundreds of files.
-                var finalStorageDir = await Task.Run(() => moveFilesToBooksDir(libraryBook, entries));
+                var finalStorageDir = getDestinationDirectory(libraryBook);
 
-                // decrypt failed
-                if (finalStorageDir is null)
-                    return new StatusHandler { "Cannot find final audio file after decryption" };
+				Task[] finalTasks = new[]
+                {
+					Task.Run(() => downloadCoverArt(libraryBook)),
+					Task.Run(() => moveFilesToBooksDir(libraryBook, entries)),
+					Task.Run(() => libraryBook.Book.UpdateBookStatus(LiberatedStatus.Liberated, Configuration.LibationVersion)),
+					Task.Run(() => WindowsDirectory.SetCoverAsFolderIcon(libraryBook.Book.PictureId, finalStorageDir))
+				};
 
-                if (Configuration.Instance.DownloadCoverArt)
-                    downloadCoverArt(libraryBook);
-
-                // contains logic to check for config setting and OS
-                WindowsDirectory.SetCoverAsFolderIcon(pictureId: libraryBook.Book.PictureId, directory: finalStorageDir);
-
-                libraryBook.Book.UpdateBookStatus(LiberatedStatus.Liberated);
+				await Task.WhenAll(finalTasks);
 
                 return new StatusHandler();
             }
@@ -131,8 +130,8 @@ namespace FileLiberator
             abDownloader.RetrievedCoverArt += AaxcDownloader_RetrievedCoverArt;
             abDownloader.FileCreated += (_, path) => OnFileCreated(libraryBook, path);
 
-            // REAL WORK DONE HERE
-            return await abDownloader.RunAsync();
+			// REAL WORK DONE HERE
+			return await abDownloader.RunAsync();
         }
 
         private DownloadOptions BuildDownloadOptions(LibraryBook libraryBook, Configuration config, AudibleApi.Common.ContentLicense contentLic)
@@ -335,18 +334,12 @@ namespace FileLiberator
 
         /// <summary>Move new files to 'Books' directory</summary>
         /// <returns>Return directory if audiobook file(s) were successfully created and can be located on disk. Else null.</returns>
-        private static string moveFilesToBooksDir(LibraryBook libraryBook, List<FilePathCache.CacheEntry> entries)
+        private static void moveFilesToBooksDir(LibraryBook libraryBook, List<FilePathCache.CacheEntry> entries)
         {
             // create final directory. move each file into it
-            var destinationDir = AudibleFileStorage.Audio.GetDestinationDirectory(libraryBook);
-            Directory.CreateDirectory(destinationDir);
+            var destinationDir = getDestinationDirectory(libraryBook);
 
-            FilePathCache.CacheEntry getFirstAudio() => entries.FirstOrDefault(f => f.FileType == FileType.Audio);
-
-            if (getFirstAudio() == default)
-                return null;
-
-            for (var i = 0; i < entries.Count; i++)
+			for (var i = 0; i < entries.Count; i++)
             {
                 var entry = entries[i];
 
@@ -357,22 +350,33 @@ namespace FileLiberator
                 entries[i] = entry with { Path = realDest };
             }
 
-            var cue = entries.FirstOrDefault(f => f.FileType == FileType.Cue);
+			var cue = entries.FirstOrDefault(f => f.FileType == FileType.Cue);
             if (cue != default)
-                Cue.UpdateFileName(cue.Path, getFirstAudio().Path);
+                Cue.UpdateFileName(cue.Path, getFirstAudioFile(entries).Path);
 
             AudibleFileStorage.Audio.Refresh();
-
-            return destinationDir;
         }
 
-        private static void downloadCoverArt(LibraryBook libraryBook)
+        private static string getDestinationDirectory(LibraryBook libraryBook)
         {
+			var destinationDir = AudibleFileStorage.Audio.GetDestinationDirectory(libraryBook);
+            if (!Directory.Exists(destinationDir))
+                Directory.CreateDirectory(destinationDir);
+            return destinationDir;
+		}
+
+		private static FilePathCache.CacheEntry getFirstAudioFile(IEnumerable<FilePathCache.CacheEntry> entries)
+            => entries.FirstOrDefault(f => f.FileType == FileType.Audio);
+
+		private static void downloadCoverArt(LibraryBook libraryBook)
+        {
+            if (!Configuration.Instance.DownloadCoverArt) return;
+
             var coverPath = "[null]";
 
             try
             {
-                var destinationDir = AudibleFileStorage.Audio.GetDestinationDirectory(libraryBook);
+                var destinationDir = getDestinationDirectory(libraryBook);
                 coverPath = AudibleFileStorage.Audio.GetBooksDirectoryFilename(libraryBook, ".jpg");
                 coverPath = Path.Combine(destinationDir, Path.GetFileName(coverPath));
 

Source/FileLiberator/DownloadOptions.cs

@@ -22,7 +22,7 @@ namespace FileLiberator
 		public OutputFormat OutputFormat { get; init; }
 		public ChapterInfo ChapterInfo { get; init; }
 		public NAudio.Lame.LameConfig LameConfig { get; init; }
-		public string UserAgent => AudibleApi.Resources.USER_AGENT;
+		public string UserAgent => AudibleApi.Resources.Download_User_Agent;
 		public bool TrimOutputToChapterLength => config.AllowLibationFixup && config.StripAudibleBrandAudio;
 		public bool StripUnabridged => config.AllowLibationFixup && config.StripUnabridged;
 		public bool CreateCueSheet => config.CreateCueSheet;

Source/HangoverAvalonia/HangoverAvalonia.csproj

@@ -21,13 +21,7 @@
 	</PropertyGroup>
 
   <PropertyGroup>
-    <!--
-    HACK FOR COMPILER BUG  2021-09-14. Hopefully will be fixed in future versions
-    - Not using SatelliteResourceLanguages will load all language packs: works
-    - Specifying 'en' semicolon 1 more should load 1 language pack: works
-    - Specifying only 'en' should load no language packs: broken, still loads all
-    -->
-    <SatelliteResourceLanguages>en;es</SatelliteResourceLanguages>
+    <SatelliteResourceLanguages>en</SatelliteResourceLanguages>
   </PropertyGroup>
 
 	<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">

Source/HangoverWinForms/HangoverWinForms.csproj

@@ -16,13 +16,7 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <!--
-    HACK FOR COMPILER BUG  2021-09-14. Hopefully will be fixed in future versions
-    - Not using SatelliteResourceLanguages will load all language packs: works
-    - Specifying 'en' semicolon 1 more should load 1 language pack: works
-    - Specifying only 'en' should load no language packs: broken, still loads all
-    -->
-    <SatelliteResourceLanguages>en;es</SatelliteResourceLanguages>
+    <SatelliteResourceLanguages>en</SatelliteResourceLanguages>
   </PropertyGroup>
 
   <!--

Source/LibationAvalonia/App.axaml.cs

@@ -11,11 +11,13 @@ using System.Threading.Tasks;
 using System.Collections.Generic;
 using System.IO;
 using ApplicationServices;
+using Avalonia.Controls;
 
 namespace LibationAvalonia
 {
 	public class App : Application
 	{
+		public static Window MainWindow { get;private set; }
 		public static IBrush ProcessQueueBookFailedBrush { get; private set; }
 		public static IBrush ProcessQueueBookCompletedBrush { get; private set; }
 		public static IBrush ProcessQueueBookCancelledBrush { get; private set; }
@@ -213,7 +215,7 @@ namespace LibationAvalonia
 		private static void ShowMainWindow(IClassicDesktopStyleApplicationLifetime desktop)
 		{
 			var mainWindow = new MainWindow();
-			desktop.MainWindow = mainWindow;
+			desktop.MainWindow = MainWindow = mainWindow;
 			mainWindow.RestoreSizeAndLocation(Configuration.Instance);
 			mainWindow.OnLoad();
 			mainWindow.OnLibraryLoaded(LibraryTask.GetAwaiter().GetResult());

Source/LibationAvalonia/Assets/LibationStyles.xaml

@@ -8,6 +8,8 @@
 		<SolidColorBrush x:Key="ProcessQueueBookCancelledBrush" Color="Khaki" />
 		<SolidColorBrush x:Key="ProcessQueueBookDefaultBrush" Color="{StaticResource SystemAltHighColor}" />
 		<SolidColorBrush x:Key="ProcessQueueBookBorderBrush" Color="Gray" />
+		<SolidColorBrush x:Key="DisabledGrayBrush" Color="#60D3D3D3" />
+		
 	</Styles.Resources>
 	<Style Selector="TextBox[IsReadOnly=true]">
 		<Setter Property="Background" Value="LightGray" />

Source/LibationAvalonia/AvaloniaUtils.cs

@@ -1,8 +1,6 @@
 using Avalonia.Controls;
 using Avalonia.Media;
-using Avalonia.Threading;
-using System;
-using System.Threading;
+using LibationAvalonia.Dialogs;
 using System.Threading.Tasks;
 
 namespace LibationAvalonia
@@ -18,6 +16,9 @@ namespace LibationAvalonia
 			return defaultBrush;
 		}
 
+		public static Task<DialogResult> ShowDialogAsync(this DialogWindow dialogWindow, Window owner = null)
+			=> dialogWindow.ShowDialog<DialogResult>(owner ?? App.MainWindow);
+
 		public static Window GetParentWindow(this IControl control) => control.VisualRoot as Window;
 	}
 }

Source/LibationAvalonia/Controls/CheckedListBox.axaml

@@ -0,0 +1,30 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+			 mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="LibationAvalonia.Controls.CheckedListBox">
+	
+	<UserControl.Resources>
+		<RecyclePool x:Key="RecyclePool" />
+		<DataTemplate x:Key="queuedBook">
+			<CheckBox HorizontalAlignment="Stretch" Margin="10,0,0,0" Content="{Binding Item}" IsChecked="{Binding IsChecked, Mode=TwoWay}" />
+		</DataTemplate>
+		<RecyclingElementFactory x:Key="elementFactory" RecyclePool="{StaticResource RecyclePool}">
+			<RecyclingElementFactory.Templates>
+				<StaticResource x:Key="queuedBook" ResourceKey="queuedBook" />
+			</RecyclingElementFactory.Templates>
+		</RecyclingElementFactory>
+	</UserControl.Resources>
+
+	<ScrollViewer
+		Name="scroller"
+		HorizontalScrollBarVisibility="Disabled"
+		VerticalScrollBarVisibility="Auto">
+		<ItemsRepeater IsVisible="True"
+			VerticalCacheLength="1.2"
+			HorizontalCacheLength="1"
+			Items="{Binding CheckboxItems}"
+			ItemTemplate="{StaticResource elementFactory}" />
+	</ScrollViewer>
+</UserControl>

Source/LibationAvalonia/Controls/CheckedListBox.axaml.cs

@@ -0,0 +1,46 @@
+using Avalonia;
+using Avalonia.Collections;
+using Avalonia.Controls;
+using LibationAvalonia.ViewModels;
+using ReactiveUI;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace LibationAvalonia.Controls
+{
+	public partial class CheckedListBox : UserControl
+	{
+		public static readonly StyledProperty<AvaloniaList<CheckBoxViewModel>> ItemsProperty =
+		AvaloniaProperty.Register<CheckedListBox, AvaloniaList<CheckBoxViewModel>>(nameof(Items));
+
+		public AvaloniaList<CheckBoxViewModel> Items { get => GetValue(ItemsProperty); set => SetValue(ItemsProperty, value); }
+		private CheckedListBoxViewModel _viewModel = new();	
+
+		public CheckedListBox()
+		{
+			InitializeComponent();
+			scroller.DataContext = _viewModel;
+		}
+		protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs change)
+		{
+			if (change.Property.Name == nameof(Items) && Items != null)
+				_viewModel.CheckboxItems = Items;
+			base.OnPropertyChanged(change);
+		}
+
+		private class CheckedListBoxViewModel : ViewModelBase
+		{
+			private AvaloniaList<CheckBoxViewModel> _checkboxItems;
+			public AvaloniaList<CheckBoxViewModel> CheckboxItems { get => _checkboxItems; set => this.RaiseAndSetIfChanged(ref _checkboxItems, value); }
+		}
+	}
+
+	public class CheckBoxViewModel : ViewModelBase
+	{
+		private bool _isChecked;
+		public bool IsChecked { get => _isChecked; set => this.RaiseAndSetIfChanged(ref _isChecked, value); }
+		private object _bookText;
+		public object Item { get => _bookText; set => this.RaiseAndSetIfChanged(ref _bookText, value); }
+	}
+}

Source/LibationAvalonia/Dialogs/AccountsDialog.axaml

@@ -36,6 +36,7 @@
 								Width="60"
 								Height="30"
 								Content="X"
+								HorizontalContentAlignment="Center"
 								IsEnabled="{Binding !IsDefault}"
 								Click="DeleteButton_Clicked" />
 

Source/LibationAvalonia/Dialogs/ImageDisplayDialog.axaml.cs

@@ -1,8 +1,5 @@
-using Avalonia;
-using Avalonia.Controls;
 using Avalonia.Markup.Xaml;
 using Avalonia.Media.Imaging;
-using Avalonia.Platform;
 using System;
 using System.ComponentModel;
 using System.IO;
@@ -16,23 +13,8 @@ namespace LibationAvalonia.Dialogs
 		public string PictureFileName { get; set; }
 		public string BookSaveDirectory { get; set; }
 
-		private byte[] _coverBytes;
-		public byte[] CoverBytes
-		{
-			get => _coverBytes;
-			set
-			{
-				_coverBytes = value;
-				var ms = new MemoryStream(_coverBytes);
-				ms.Position = 0;
-				_bitmapHolder.CoverImage = new Bitmap(ms);
-			}
-		}
-
-
 		private readonly BitmapHolder _bitmapHolder = new BitmapHolder();
 
-
 		public ImageDisplayDialog()
 		{
 			InitializeComponent();
@@ -45,6 +27,21 @@ namespace LibationAvalonia.Dialogs
 			AvaloniaXamlLoader.Load(this);
 		}
 
+		public void SetCoverBytes(byte[] cover)
+		{
+			try
+			{
+				var ms = new MemoryStream(cover);
+				_bitmapHolder.CoverImage = new Bitmap(ms);
+			}
+			catch (Exception ex)
+			{
+				Serilog.Log.Logger.Error(ex, "Error loading cover art for {file}", PictureFileName);
+				using var ms = App.OpenAsset("img-coverart-prod-unavailable_500x500.jpg");
+				_bitmapHolder.CoverImage = new Bitmap(ms);				
+			}
+		}
+
 		public async void SaveImage_Clicked(object sender, Avalonia.Interactivity.RoutedEventArgs e)
 		{
 			var options = new FilePickerSaveOptions
@@ -70,7 +67,7 @@ namespace LibationAvalonia.Dialogs
 
 			try
 			{
-				File.WriteAllBytes(uri.LocalPath, CoverBytes);
+				_bitmapHolder.CoverImage.Save(uri.LocalPath);
 			}
 			catch (Exception ex)
 			{

Source/LibationAvalonia/Dialogs/Login/AvaloniaLoginBase.cs

@@ -1,22 +0,0 @@
-using Avalonia;
-using Avalonia.Controls.ApplicationLifetimes;
-using System;
-using System.Threading.Tasks;
-
-namespace LibationAvalonia.Dialogs.Login
-{
-	public abstract class AvaloniaLoginBase
-	{
-
-		/// <returns>True if ShowDialog's DialogResult == OK</returns>
-		protected static async Task<bool> ShowDialog(DialogWindow dialog)
-		{
-			if (Application.Current.ApplicationLifetime is not IClassicDesktopStyleApplicationLifetime desktop)
-				return false;
-
-			var result = await dialog.ShowDialog<DialogResult>(desktop.MainWindow);
-			Serilog.Log.Logger.Debug("{@DebugInfo}", new { DialogResult = result });
-			return result == DialogResult.OK;
-		}
-	}
-}

Source/LibationAvalonia/Dialogs/Login/AvaloniaLoginCallback.cs

@@ -5,36 +5,38 @@ using AudibleUtilities;
 
 namespace LibationAvalonia.Dialogs.Login
 {
-	public class AvaloniaLoginCallback : AvaloniaLoginBase, ILoginCallback
+	public class AvaloniaLoginCallback : ILoginCallback
 	{
 		private Account _account { get; }
 
+		public string DeviceName { get; } = "Libation";
+
 		public AvaloniaLoginCallback(Account account)
 		{
 			_account = Dinah.Core.ArgumentValidator.EnsureNotNull(account, nameof(account));
 		}
 
-		public async Task<string> Get2faCodeAsync()
+		public async Task<string> Get2faCodeAsync(string prompt)
 		{
-			var dialog = new _2faCodeDialog();
-			if (await ShowDialog(dialog))
+			var dialog = new _2faCodeDialog(prompt);
+			if (await dialog.ShowDialogAsync() is DialogResult.OK)
 				return dialog.Code;
 
 			return null;
 		}
 
-		public async Task<string> GetCaptchaAnswerAsync(byte[] captchaImage)
+		public async Task<(string password, string guess)> GetCaptchaAnswerAsync(string password, byte[] captchaImage)
 		{
-			var dialog = new CaptchaDialog(captchaImage);
-			if (await ShowDialog(dialog))
-				return dialog.Answer;
-			return null;
+			var dialog = new CaptchaDialog(password, captchaImage);
+			if (await dialog.ShowDialogAsync() is DialogResult.OK)
+				return (dialog.Password, dialog.Answer);
+			return (null, null);
 		}
 
 		public async Task<(string name, string value)> GetMfaChoiceAsync(MfaConfig mfaConfig)
 		{
 			var dialog = new MfaDialog(mfaConfig);
-			if (await ShowDialog(dialog))
+			if (await dialog.ShowDialogAsync() is DialogResult.OK)
 				return (dialog.SelectedName, dialog.SelectedValue);
 			return (null, null);
 		}
@@ -42,7 +44,7 @@ namespace LibationAvalonia.Dialogs.Login
 		public async Task<(string email, string password)> GetLoginAsync()
 		{
 			var dialog = new LoginCallbackDialog(_account);
-			if (await ShowDialog(dialog))
+			if (await dialog.ShowDialogAsync() is DialogResult.OK)
 				return (_account.AccountId, dialog.Password);
 			return (null, null);
 		}
@@ -50,7 +52,7 @@ namespace LibationAvalonia.Dialogs.Login
 		public async Task ShowApprovalNeededAsync()
 		{
 			var dialog = new ApprovalNeededDialog();
-			await ShowDialog(dialog);
+			await dialog.ShowDialogAsync();
 		}
 	}
 }

Source/LibationAvalonia/Dialogs/Login/AvaloniaLoginChoiceEager.cs

@@ -5,14 +5,15 @@ using AudibleUtilities;
 
 namespace LibationAvalonia.Dialogs.Login
 {
-	public class AvaloniaLoginChoiceEager : AvaloniaLoginBase, ILoginChoiceEager
+	public class AvaloniaLoginChoiceEager : ILoginChoiceEager
 	{
 		/// <summary>Convenience method. Recommended when wiring up Winforms to <see cref="ApplicationServices.LibraryCommands.ImportAccountAsync"/></summary>
-		public static async Task<ApiExtended> ApiExtendedFunc(Account account) => await ApiExtended.CreateAsync(account, new AvaloniaLoginChoiceEager(account));
+		public static async Task<ApiExtended> ApiExtendedFunc(Account account)
+			=> await ApiExtended.CreateAsync(account, new AvaloniaLoginChoiceEager(account));
 
-		public ILoginCallback LoginCallback { get; private set; }
+		public ILoginCallback LoginCallback { get; }
 
-		private Account _account { get; }
+		private readonly Account _account;
 
 		public AvaloniaLoginChoiceEager(Account account)
 		{
@@ -24,10 +25,9 @@ namespace LibationAvalonia.Dialogs.Login
 		{
 			var dialog = new LoginChoiceEagerDialog(_account);
 
-			if (!await ShowDialog(dialog))
+			if (await dialog.ShowDialogAsync() is not DialogResult.OK)
 				return null;
 
-
 			switch (dialog.LoginMethod)
 			{
 				case LoginMethod.Api:
@@ -35,7 +35,7 @@ namespace LibationAvalonia.Dialogs.Login
 				case LoginMethod.External:
 					{
 						var externalDialog = new LoginExternalDialog(_account, choiceIn.LoginUrl);
-						return await ShowDialog(externalDialog)
+						return await externalDialog.ShowDialogAsync() is DialogResult.OK
 							? ChoiceOut.External(externalDialog.ResponseUrl)
 							: null;
 					}

Source/LibationAvalonia/Dialogs/Login/CaptchaDialog.axaml

@@ -2,22 +2,22 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-        mc:Ignorable="d" d:DesignWidth="220" d:DesignHeight="180"
-		MinWidth="220" MinHeight="180"
-		MaxWidth="220" MaxHeight="180"
+        mc:Ignorable="d" d:DesignWidth="220" d:DesignHeight="250"
+		MinWidth="220" MinHeight="250"
+		MaxWidth="220" MaxHeight="250"
         x:Class="LibationAvalonia.Dialogs.Login.CaptchaDialog"
         Title="CAPTCHA"
 		Icon="/Assets/libation.ico">
 
 	<Grid
-		RowDefinitions="Auto,Auto,*"
-		ColumnDefinitions="Auto,*">
+		RowDefinitions="Auto,Auto,Auto,Auto,*"
+		ColumnDefinitions="Auto,*" 
+			Margin="10">
 		
 		<Panel
 			Grid.Row="0"
 			Grid.Column="0"
 			Grid.ColumnSpan="2"
-			Margin="10"
 			MinWidth="200"
 			MinHeight="70"
 			Background="LightGray">
@@ -30,23 +30,40 @@
 		
 		<TextBlock
 			Grid.Row="1"
+			Margin="0,10,0,0"
+			VerticalAlignment="Center"
+			Text="Password:" />
+
+		<TextBox
+			Name="passwordBox"
+			Grid.Row="2"
 			Grid.Column="0"
-			Margin="10,0,10,0"
+			Grid.ColumnSpan="2"
+			Margin="0,10,0,0"
+			PasswordChar="*"
+			Text="{Binding Password, Mode=TwoWay}" />
+		
+		<TextBlock
+			Grid.Row="3"
+			Grid.Column="0"
+			Margin="0,10,10,0"
 			VerticalAlignment="Center"
 			Text="CAPTCHA&#xa;answer:" />
 		
 		<TextBox
-			Grid.Row="1"
+			Name="captchaBox"
+			Grid.Row="3"
 			Grid.Column="1"
-			Margin="10,0,10,0" Text="{Binding Answer}" />
+			Margin="0,10,0,0"
+			Text="{Binding Answer, Mode=TwoWay}" />
 		
 		<Button
-			Grid.Row="2"
+			Grid.Row="4"
 			Grid.Column="1"
-			Margin="10"
 			Padding="0,5,0,5"
 			VerticalAlignment="Bottom"
 			HorizontalAlignment="Stretch"
+			HorizontalContentAlignment="Center"
 			Content="Submit"
 			Click="Submit_Click" />
 		

Source/LibationAvalonia/Dialogs/Login/CaptchaDialog.axaml.cs

@@ -1,5 +1,8 @@
+using Avalonia.Controls;
 using Avalonia.Markup.Xaml;
 using Avalonia.Media.Imaging;
+using LibationAvalonia.ViewModels;
+using ReactiveUI;
 using System.IO;
 using System.Threading.Tasks;
 
@@ -7,18 +10,43 @@ namespace LibationAvalonia.Dialogs.Login
 {
 	public partial class CaptchaDialog : DialogWindow
 	{
-		public string Answer { get; set; }
-		public Bitmap CaptchaImage { get; }
+		public string Password => _viewModel.Password;
+		public string Answer => _viewModel.Answer;
+
+		private readonly CaptchaDialogViewModel _viewModel;
 		public CaptchaDialog()
 		{
 			InitializeComponent();
+			passwordBox = this.FindControl<TextBox>(nameof(passwordBox));
+			captchaBox = this.FindControl<TextBox>(nameof(captchaBox));
 		}
 
-		public CaptchaDialog(byte[] captchaImage) :this()
+		public CaptchaDialog(string password, byte[] captchaImage) :this()
 		{
-			using var ms = new MemoryStream(captchaImage);
-			CaptchaImage = new Bitmap(ms);
-			DataContext = this;
+			//Avalonia doesn't support animated gifs.
+			//Deconstruct gifs into frames and manually switch them.
+			using var gif = SixLabors.ImageSharp.Image.Load(captchaImage);
+			var gifEncoder = new SixLabors.ImageSharp.Formats.Gif.GifEncoder();
+			var gifFrames = new Bitmap[gif.Frames.Count];
+			var frameDelayMs = new int[gif.Frames.Count];
+
+			for (int i = 0; i < gif.Frames.Count; i++)
+			{
+				var frameMetadata = gif.Frames[i].Metadata.GetFormatMetadata(SixLabors.ImageSharp.Formats.Gif.GifFormat.Instance);
+
+                using var clonedFrame = gif.Frames.CloneFrame(i);
+				using var framems = new MemoryStream();
+
+				clonedFrame.Save(framems, gifEncoder);
+				framems.Position = 0;
+
+				gifFrames[i] = new Bitmap(framems);
+				frameDelayMs[i] = frameMetadata.FrameDelay * 10;
+			}
+
+			DataContext = _viewModel = new(password, gifFrames, frameDelayMs);
+
+			Opened += (_, _) => (string.IsNullOrEmpty(password) ? passwordBox : captchaBox).Focus();
 		}
 
 		private void InitializeComponent()
@@ -26,15 +54,73 @@ namespace LibationAvalonia.Dialogs.Login
 			AvaloniaXamlLoader.Load(this);
 		}
 
-
-		protected override Task SaveAndCloseAsync()
+		protected override async Task SaveAndCloseAsync()
 		{
-			Serilog.Log.Logger.Information("Submit button clicked: {@DebugInfo}", new { Answer });
+			if (string.IsNullOrWhiteSpace(_viewModel.Password))
+			{
+				await MessageBox.Show(this, "Please re-enter your password");
+				return;
+			}
 
-			return base.SaveAndCloseAsync();
+			Serilog.Log.Logger.Information("Submit button clicked: {@DebugInfo}", new { _viewModel.Answer });
+
+			await _viewModel.StopAsync();
+			await base.SaveAndCloseAsync();
+		}
+
+		protected override async Task CancelAndCloseAsync()
+		{
+			await _viewModel.StopAsync();
+			await base.CancelAndCloseAsync();	
 		}
 
 		public async void Submit_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
 			=> await SaveAndCloseAsync();
 	}
+
+	public class CaptchaDialogViewModel : ViewModelBase
+	{
+		public string Answer { get; set; }
+		public string Password { get; set; }
+		public Bitmap CaptchaImage { get => _captchaImage; private set => this.RaiseAndSetIfChanged(ref _captchaImage, value); }
+
+		private Bitmap _captchaImage;
+		private bool keepSwitching = true;
+		private readonly Task FrameSwitch;
+
+		public CaptchaDialogViewModel(string password, Bitmap[] gifFrames, int[] frameDelayMs)
+		{
+			Password = password;
+			if (gifFrames.Length == 1)
+			{
+				FrameSwitch = Task.CompletedTask;
+				CaptchaImage = gifFrames[0];
+			}
+			else
+			{
+				FrameSwitch = SwitchFramesAsync(gifFrames, frameDelayMs);
+			}
+		}
+
+		public async Task StopAsync()
+		{
+			keepSwitching = false;
+			await FrameSwitch;
+		}
+
+		private async Task SwitchFramesAsync(Bitmap[] gifFrames, int[] frameDelayMs)
+		{
+			int index = 0;
+			while(keepSwitching)
+			{
+				CaptchaImage = gifFrames[index];
+				await Task.Delay(frameDelayMs[index++]);
+
+				index %= gifFrames.Length;
+			}
+
+			foreach (var frame in gifFrames)
+				frame.Dispose();
+		}
+	}
 }

Source/LibationAvalonia/Dialogs/Login/LoginExternalDialog.axaml.cs

@@ -1,4 +1,3 @@
-using AudibleApi;
 using AudibleUtilities;
 using Avalonia;
 using Avalonia.Controls;
@@ -49,7 +48,7 @@ namespace LibationAvalonia.Dialogs.Login
 		protected override async Task SaveAndCloseAsync()
 		{
 			Serilog.Log.Logger.Information("Submit button clicked: {@DebugInfo}", new { ResponseUrl });
-			if (!Uri.TryCreate(ResponseUrl, UriKind.Absolute, out var result))
+			if (!Uri.TryCreate(ResponseUrl, UriKind.Absolute, out _))
 			{
 				await MessageBox.Show("Invalid response URL");
 				return;

Source/LibationAvalonia/Dialogs/Login/MfaDialog.axaml

@@ -2,9 +2,9 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-        mc:Ignorable="d" d:DesignWidth="400" d:DesignHeight="160"
-		MinWidth="400" MinHeight="160"
-		MaxWidth="400" MaxHeight="160"
+        mc:Ignorable="d" d:DesignWidth="400" d:DesignHeight="200"
+		MinWidth="400" MinHeight="200"
+		MaxWidth="400" MaxHeight="200"
         x:Class="LibationAvalonia.Dialogs.Login.MfaDialog"
         Title="Two-Step Verification"
 		Icon="/Assets/libation.ico">

Source/LibationAvalonia/Dialogs/Login/_2faCodeDialog.axaml

@@ -2,30 +2,41 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-        mc:Ignorable="d" d:DesignWidth="140" d:DesignHeight="100"
-		MinWidth="140" MinHeight="100"
-		MaxWidth="140" MaxHeight="100"
+        mc:Ignorable="d" d:DesignWidth="200" d:DesignHeight="200"
+		MinWidth="200" MinHeight="200"
+		MaxWidth="200" MaxHeight="200"
         x:Class="LibationAvalonia.Dialogs.Login._2faCodeDialog"
         Title="2FA Code"
 		Icon="/Assets/libation.ico">
 	
-	<Grid RowDefinitions="Auto,Auto,*">
+	<Grid
+		VerticalAlignment="Stretch"
+		ColumnDefinitions="*" Margin="5"
+		RowDefinitions="*,Auto,Auto,Auto">
+		
+		<TextBlock
+			TextAlignment="Center"
+			TextWrapping="Wrap"
+			Text="{Binding Prompt}" />
 		
 		<TextBlock
 			Margin="5"
+			Grid.Row="1"
 			TextAlignment="Center"
 			Text="Enter 2FA Code" />
-		
+
 		<TextBox
+			Name="_2FABox"
 			Margin="5,0,5,0"
-			Grid.Row="1"
+			Grid.Row="2"
+			HorizontalContentAlignment="Center"
 			Text="{Binding Code, Mode=TwoWay}" />
 		
 		<Button
 			Margin="5"
-			Grid.Row="2"
-			VerticalAlignment="Bottom"
+			Grid.Row="3"
 			HorizontalAlignment="Stretch"
+			HorizontalContentAlignment="Center"
 			Content="Submit"
 			Click="Submit_Click" />
 	</Grid>

Source/LibationAvalonia/Dialogs/Login/_2faCodeDialog.axaml.cs

@@ -1,4 +1,3 @@
-using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Markup.Xaml;
 using System.Threading.Tasks;
@@ -8,16 +7,20 @@ namespace LibationAvalonia.Dialogs.Login
 	public partial class _2faCodeDialog : DialogWindow
 	{
 		public string Code { get; set; }
+		public string Prompt { get; } = "For added security, please enter the One Time Password (OTP) generated by your Authenticator App";
+
 
 		public _2faCodeDialog()
 		{
-			InitializeComponent();
-			DataContext = this;
+			AvaloniaXamlLoader.Load(this);
+			_2FABox = this.FindControl<TextBox>(nameof(_2FABox));
 		}
 
-		private void InitializeComponent()
+		public _2faCodeDialog(string prompt) : this()
 		{
-			AvaloniaXamlLoader.Load(this);
+			Prompt = prompt;
+			DataContext = this;
+			Opened += (_, _) => _2FABox.Focus();
 		}
 
 		protected override Task SaveAndCloseAsync()

Source/LibationAvalonia/Dialogs/SettingsDialog.axaml

@@ -2,8 +2,8 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-        mc:Ignorable="d" d:DesignWidth="850" d:DesignHeight="620"
-		MinWidth="800" MinHeight="620"
+        mc:Ignorable="d" d:DesignWidth="900" d:DesignHeight="750"
+		MinWidth="900" MinHeight="700"
         x:Class="LibationAvalonia.Dialogs.SettingsDialog"
         xmlns:controls="clr-namespace:LibationAvalonia.Controls"
         Title="Edit Settings"
@@ -376,7 +376,7 @@
 							Grid.Row="3"
 							Margin="5"
 							VerticalAlignment="Top"
-							IsVisible="{Binding IsWindows}"
+							IsVisible="{Binding !IsLinux}"
 							IsChecked="{Binding DownloadDecryptSettings.UseCoverAsFolderIcon, Mode=TwoWay}">
 
 							<TextBlock
@@ -603,6 +603,25 @@
 										</CheckBox>
 									</Grid>
 
+									<Grid Margin="5,5,5,0" RowDefinitions="Auto,Auto" ColumnDefinitions="Auto,*,Auto">
+
+										<TextBlock Margin="0,0,0,5" Text="Max audio sample rate:" />
+										<controls:WheelComboBox
+											Grid.Row="1"
+											HorizontalAlignment="Stretch"
+											Items="{Binding AudioSettings.SampleRates}"
+											SelectedItem="{Binding AudioSettings.SelectedSampleRate, Mode=TwoWay}"/>
+										
+										<TextBlock Margin="0,0,0,5" Grid.Column="2" Text="Encoder Quality:" />
+										
+										<controls:WheelComboBox
+											Grid.Column="2"
+											Grid.Row="1"
+											HorizontalAlignment="Stretch"
+											Items="{Binding AudioSettings.EncoderQualities}"
+											SelectedItem="{Binding AudioSettings.SelectedEncoderQuality, Mode=TwoWay}"/>
+									</Grid>
+
 									<controls:GroupBox
 										Margin="5,5,5,0"
 										BorderWidth="1"

Source/LibationAvalonia/Dialogs/SettingsDialog.axaml.cs

@@ -11,6 +11,7 @@ using System.Linq;
 using FileManager;
 using System.IO;
 using Avalonia.Collections;
+using LibationUiBase;
 
 namespace LibationAvalonia.Dialogs
 {
@@ -107,7 +108,8 @@ namespace LibationAvalonia.Dialogs
 			LoadSettings(config);
 		}
 
-		public bool IsWindows => AppScaffolding.LibationScaffolding.ReleaseIdentifier is AppScaffolding.ReleaseIdentifier.WindowsAvalonia;
+		public bool IsLinux => Configuration.IsLinux;
+		public bool IsWindows => Configuration.IsWindows;
 		public ImportantSettings ImportantSettings { get; private set; }
 		public ImportSettings ImportSettings { get; private set; }
 		public DownloadDecryptSettings DownloadDecryptSettings { get; private set; }
@@ -372,6 +374,31 @@ namespace LibationAvalonia.Dialogs
 		private int _lameBitrate;
 		private int _lameVBRQuality;
 		private string _chapterTitleTemplate;
+		public SampleRateSelection SelectedSampleRate { get; set; }
+		public NAudio.Lame.EncoderQuality SelectedEncoderQuality { get; set; }
+
+		public AvaloniaList<SampleRateSelection> SampleRates { get; }
+			= new(
+				new []
+				{
+					AAXClean.SampleRate.Hz_44100,
+					AAXClean.SampleRate.Hz_32000,
+					AAXClean.SampleRate.Hz_24000,
+					AAXClean.SampleRate.Hz_22050,
+					AAXClean.SampleRate.Hz_16000,
+					AAXClean.SampleRate.Hz_12000,
+				}
+				.Select(s => new SampleRateSelection(s)));
+
+		public AvaloniaList<NAudio.Lame.EncoderQuality> EncoderQualities { get; }
+		= new(
+			new[]
+			{
+				NAudio.Lame.EncoderQuality.High,
+				NAudio.Lame.EncoderQuality.Standard,
+				NAudio.Lame.EncoderQuality.Fast,
+			});
+
 
 		public AudioSettings(Configuration config)
 		{
@@ -398,6 +425,9 @@ namespace LibationAvalonia.Dialogs
 			LameMatchSource = config.LameMatchSourceBR;
 			LameBitrate = config.LameBitrate;
 			LameVBRQuality = config.LameVBRQuality;
+
+			SelectedSampleRate = SampleRates.FirstOrDefault(s => s.SampleRate == config.MaxSampleRate);
+			SelectedEncoderQuality = config.LameEncoderQuality;
 		}
 
 		public Task<bool> SaveSettingsAsync(Configuration config)
@@ -422,6 +452,9 @@ namespace LibationAvalonia.Dialogs
 			config.LameBitrate = LameBitrate;
 			config.LameVBRQuality = LameVBRQuality;
 
+			config.LameEncoderQuality = SelectedEncoderQuality;
+			config.MaxSampleRate = SelectedSampleRate?.SampleRate ?? config.MaxSampleRate;
+
 			return Task.FromResult(true);
 		}
 

Source/LibationAvalonia/Dialogs/TrashBinDialog.axaml

@@ -0,0 +1,66 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        mc:Ignorable="d" d:DesignWidth="630" d:DesignHeight="480"
+        x:Class="LibationAvalonia.Dialogs.TrashBinDialog"
+		xmlns:controls="clr-namespace:LibationAvalonia.Controls"
+		MinWidth="630" MinHeight="480" 
+        Title="Trash Bin"
+		WindowStartupLocation="CenterOwner"
+		Icon="/Assets/libation.ico">
+	
+	<Grid
+		RowDefinitions="Auto,*,Auto">
+		
+		<TextBlock
+			Grid.Row="0"
+			Margin="5"
+			Text="Check books you want to permanently delete from or restore to Libation" />
+
+		<controls:CheckedListBox
+			Grid.Row="1"
+			Margin="5,0,5,0"
+			BorderThickness="1"
+			BorderBrush="Gray"
+			IsEnabled="{Binding	ControlsEnabled}"
+			Items="{Binding DeletedBooks}" />
+
+		<Grid
+			Grid.Row="2"
+			Margin="5"
+			ColumnDefinitions="Auto,Auto,*,Auto">
+
+			<CheckBox
+				IsEnabled="{Binding	ControlsEnabled}"
+				IsThreeState="True"
+				Margin="0,0,20,0"
+				IsChecked="{Binding EverythingChecked}"
+				Content="Everything" />
+			
+			<TextBlock
+				Grid.Column="1"
+				VerticalAlignment="Center"
+				Text="{Binding CheckedCountText}" />
+			
+			<Button
+				IsEnabled="{Binding	ControlsEnabled}"
+				Grid.Column="2"
+				Margin="0,0,20,0"
+				HorizontalAlignment="Right"
+				VerticalAlignment="Stretch"
+				VerticalContentAlignment="Center"
+				Content="Restore"
+				Click="Restore_Click" />
+			
+			<Button
+				IsEnabled="{Binding	ControlsEnabled}"
+				Grid.Column="3"
+				Click="EmptyTrash_Click" >
+				<TextBlock
+					TextAlignment="Center"
+					Text="Permanently Delete&#xa;from Libation" />
+			</Button>
+		</Grid>
+	</Grid>
+</Window>

Source/LibationAvalonia/Dialogs/TrashBinDialog.axaml.cs

@@ -0,0 +1,145 @@
+using ApplicationServices;
+using Avalonia.Collections;
+using Avalonia.Controls;
+using Avalonia.Threading;
+using DataLayer;
+using LibationAvalonia.Controls;
+using LibationAvalonia.ViewModels;
+using LibationFileManager;
+using ReactiveUI;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace LibationAvalonia.Dialogs
+{
+	public partial class TrashBinDialog : Window
+	{
+		TrashBinViewModel _viewModel;
+
+		public TrashBinDialog()
+		{
+			InitializeComponent();
+			this.RestoreSizeAndLocation(Configuration.Instance);
+			DataContext = _viewModel = new();
+
+			this.Closing += (_,_) => this.SaveSizeAndLocation(Configuration.Instance);
+		}
+
+		public async void EmptyTrash_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
+			=> await _viewModel.PermanentlyDeleteCheckedAsync();
+		public async void Restore_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
+			=> await _viewModel.RestoreCheckedAsync();
+	}
+
+	public class TrashBinViewModel : ViewModelBase, IDisposable
+	{
+		public AvaloniaList<CheckBoxViewModel> DeletedBooks { get; }
+		public string CheckedCountText => $"Checked : {_checkedBooksCount} of {_totalBooksCount}";
+
+		private bool _controlsEnabled = true;
+		public bool ControlsEnabled { get => _controlsEnabled; set=> this.RaiseAndSetIfChanged(ref _controlsEnabled, value); }
+
+		private bool? everythingChecked = false;
+		public bool? EverythingChecked
+		{
+			get => everythingChecked;
+			set
+			{
+				everythingChecked = value ?? false;
+
+				if (everythingChecked is true)
+					CheckAll();
+				else if (everythingChecked is false)
+					UncheckAll();
+			}
+		}
+
+		private int _totalBooksCount = 0;
+		private int _checkedBooksCount = -1;
+		public int CheckedBooksCount
+		{
+			get => _checkedBooksCount;
+			set
+			{
+				if (_checkedBooksCount != value)
+				{
+					_checkedBooksCount = value;
+					this.RaisePropertyChanged(nameof(CheckedCountText));
+				}
+
+				everythingChecked
+					= _checkedBooksCount == 0 || _totalBooksCount == 0 ? false
+					: _checkedBooksCount == _totalBooksCount ? true
+					: null;
+
+				this.RaisePropertyChanged(nameof(EverythingChecked));
+			}
+		}
+
+		public IEnumerable<LibraryBook> CheckedBooks => DeletedBooks.Where(i => i.IsChecked).Select(i => i.Item).Cast<LibraryBook>();
+
+		public TrashBinViewModel()
+		{
+			DeletedBooks = new()
+			{
+				ResetBehavior = ResetBehavior.Remove
+			};
+
+			tracker = DeletedBooks.TrackItemPropertyChanged(CheckboxPropertyChanged);
+			Reload();
+		}
+
+		public void CheckAll()
+		{
+			foreach (var item in DeletedBooks)
+				item.IsChecked = true;
+		}		
+
+		public void UncheckAll()
+		{
+			foreach (var item in DeletedBooks)
+				item.IsChecked = false;
+		}
+
+		public async Task RestoreCheckedAsync()
+		{
+			ControlsEnabled = false;
+			var qtyChanges = await Task.Run(CheckedBooks.RestoreBooks);
+			if (qtyChanges > 0)
+				Reload();
+			ControlsEnabled = true;
+		}
+
+		public async Task PermanentlyDeleteCheckedAsync()
+		{
+			ControlsEnabled = false;
+			var qtyChanges = await Task.Run(CheckedBooks.PermanentlyDeleteBooks);
+			if (qtyChanges > 0)
+				Reload();
+			ControlsEnabled = true;
+		}
+
+		private void Reload()
+		{
+			var deletedBooks = DbContexts.GetContext().GetDeletedLibraryBooks();
+
+			DeletedBooks.Clear();
+			DeletedBooks.AddRange(deletedBooks.Select(lb => new CheckBoxViewModel { Item = lb }));
+
+			_totalBooksCount = DeletedBooks.Count;
+			CheckedBooksCount = 0;
+		}
+
+		private IDisposable tracker;
+		private void CheckboxPropertyChanged(Tuple<object, PropertyChangedEventArgs> e)
+		{
+			if (e.Item2.PropertyName == nameof(CheckBoxViewModel.IsChecked))
+				CheckedBooksCount = DeletedBooks.Count(b => b.IsChecked);
+		}
+
+		public void Dispose() => tracker?.Dispose();
+	}
+}

Source/LibationAvalonia/LibationAvalonia.csproj

@@ -4,8 +4,6 @@
 	<PropertyGroup>
 		<OutputType>WinExe</OutputType>
 		<TargetFramework>net7.0</TargetFramework>
-		<!--Avalonia doesen't support TrimMode=link currently,but we are working on that https://github.com/AvaloniaUI/Avalonia/issues/6892 -->
-		<TrimMode>copyused</TrimMode>
 		<BuiltInComInteropSupport>true</BuiltInComInteropSupport>
 		<ApplicationIcon>libation.ico</ApplicationIcon>
 		<AssemblyName>Libation</AssemblyName>
@@ -17,13 +15,7 @@
 	</PropertyGroup>
 
 	<PropertyGroup>
-		<!--
-    HACK FOR COMPILER BUG  2021-09-14. Hopefully will be fixed in future versions
-    - Not using SatelliteResourceLanguages will load all language packs: works
-    - Specifying 'en' semicolon 1 more should load 1 language pack: works
-    - Specifying only 'en' should load no language packs: broken, still loads all
-    -->
-		<SatelliteResourceLanguages>en;es</SatelliteResourceLanguages>
+		<SatelliteResourceLanguages>en</SatelliteResourceLanguages>
 	</PropertyGroup>
 
 	<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
@@ -39,6 +31,8 @@
 	<ItemGroup>
 		<AvaloniaResource Include="Assets\**" />
 		<None Remove=".gitignore" />
+		<None Remove="Assets\Arrows_left.png" />
+		<None Remove="Assets\Arrows_right.png" />
 		<None Remove="Assets\Asterisk.png" />
 		<None Remove="Assets\cancel.png" />
 		<None Remove="Assets\completed.png" />
@@ -109,7 +103,7 @@
 		<PackageReference Include="Avalonia.Diagnostics" Version="11.0.0-preview4 " />
 		<PackageReference Include="Avalonia.ReactiveUI" Version="11.0.0-preview4" />
 		<PackageReference Include="Avalonia.Themes.Fluent" Version="11.0.0-preview4" />
-		<PackageReference Include="XamlNameReferenceGenerator" Version="1.5.1" />
+		<PackageReference Include="XamlNameReferenceGenerator" Version="1.6.1" />
 	</ItemGroup>
 
 	<ItemGroup>

Source/LibationAvalonia/ViewModels/GridEntry.cs

@@ -1,5 +1,6 @@
 using ApplicationServices;
 using Avalonia.Media;
+using Avalonia.Media.Imaging;
 using DataLayer;
 using Dinah.Core;
 using FileLiberator;
@@ -35,18 +36,31 @@ namespace LibationAvalonia.ViewModels
 		#region Model properties exposed to the view
 
 		private Avalonia.Media.Imaging.Bitmap _cover;
-		public Avalonia.Media.Imaging.Bitmap Cover { get => _cover; protected set { this.RaiseAndSetIfChanged(ref _cover, value); } }
-		public string PurchaseDate { get; protected set; }
-		public string Series { get; protected set; }
-		public string Title { get; protected set; }
-		public string Length { get; protected set; }
-		public string Authors { get; protected set; }
-		public string Narrators { get; protected set; }
-		public string Category { get; protected set; }
-		public string Misc { get; protected set; }
-		public string Description { get; protected set; }
-		public Rating ProductRating { get; protected set; }
+		private string _purchasedate;
+		private string _series;
+		private string _title;
+		private string _length;
+		private string _authors;
+		private string _narrators;
+		private string _category;
+		private string _misc;
+		private LastDownloadStatus _lastDownload;
+		private string _description;
+		private Rating _productrating;
 		protected Rating _myRating;
+
+		public Avalonia.Media.Imaging.Bitmap Cover { get => _cover; protected set => this.RaiseAndSetIfChanged(ref _cover, value); }
+		public string PurchaseDate { get => _purchasedate; protected set => this.RaiseAndSetIfChanged(ref _purchasedate, value); }
+		public string Series { get => _series; protected set => this.RaiseAndSetIfChanged(ref _series, value); }
+		public string Title { get => _title; protected set => this.RaiseAndSetIfChanged(ref _title, value); }
+		public string Length { get => _length; protected set => this.RaiseAndSetIfChanged(ref _length, value); }
+		public string Authors { get => _authors; protected set => this.RaiseAndSetIfChanged(ref _authors, value); }
+		public string Narrators { get => _narrators; protected set => this.RaiseAndSetIfChanged(ref _narrators, value); }
+		public string Category { get => _category; protected set => this.RaiseAndSetIfChanged(ref _category, value); }
+		public LastDownloadStatus LastDownload { get => _lastDownload; protected set => this.RaiseAndSetIfChanged(ref _lastDownload, value); }
+		public string Misc { get => _misc; protected set => this.RaiseAndSetIfChanged(ref _misc, value); }
+		public string Description { get => _description; protected set => this.RaiseAndSetIfChanged(ref _description, value); }
+		public Rating ProductRating { get => _productrating; protected set => this.RaiseAndSetIfChanged(ref _productrating, value); }
 		public Rating MyRating
 		{
 			get => _myRating;
@@ -65,7 +79,6 @@ namespace LibationAvalonia.ViewModels
 		public abstract bool? Remove { get; set; }
 		public abstract LiberateButtonStatus Liberate { get; }
 		public abstract BookTags BookTags { get; }
-		public abstract bool IsSeries { get; }
 		public abstract bool IsEpisode { get; }
 		public abstract bool IsBook { get; }
 		public IBrush BackgroundBrush => IsEpisode ? App.SeriesEntryGridBackgroundBrush : Brushes.Transparent;
@@ -111,6 +124,7 @@ namespace LibationAvalonia.ViewModels
 			{ typeof(bool), new ObjectComparer<bool>() },
 			{ typeof(DateTime), new ObjectComparer<DateTime>() },
 			{ typeof(LiberateButtonStatus), new ObjectComparer<LiberateButtonStatus>() },
+			{ typeof(LastDownloadStatus), new ObjectComparer<LastDownloadStatus>() },
 		};
 
 		#endregion
@@ -126,8 +140,7 @@ namespace LibationAvalonia.ViewModels
 				PictureStorage.PictureCached += PictureStorage_PictureCached;
 
 			// Mutable property. Set the field so PropertyChanged isn't fired.
-			using var ms = new System.IO.MemoryStream(picture);
-			_cover = new Avalonia.Media.Imaging.Bitmap(ms);
+			_cover = loadImage(picture);
 		}
 
 		private void PictureStorage_PictureCached(object sender, PictureCachedEventArgs e)
@@ -143,12 +156,28 @@ namespace LibationAvalonia.ViewModels
             // logic validation
             if (e.Definition.PictureId == Book.PictureId)
 			{
-				using var ms = new System.IO.MemoryStream(e.Picture);
-				Cover = new Avalonia.Media.Imaging.Bitmap(ms);
+				Cover = loadImage(e.Picture);
 				PictureStorage.PictureCached -= PictureStorage_PictureCached;
 			}
 		}
 
+		private Bitmap loadImage(byte[] picture)
+		{
+			try
+			{
+				using var ms = new System.IO.MemoryStream(picture);
+				return new Bitmap(ms);
+			}
+			catch (Exception ex)
+			{
+				Serilog.Log.Logger.Error(ex, "Error loading cover art for {Book}", Book);
+				return DefaultImage;
+			}
+		}
+
+		private static Bitmap _defaultImage;
+		private static Bitmap DefaultImage => _defaultImage ??= new Bitmap(App.OpenAsset("img-coverart-prod-unavailable_80x80.jpg"));
+
 		#endregion
 
 		#region Static library display functions		

Source/LibationAvalonia/ViewModels/LiberateButtonStatus.cs

@@ -8,9 +8,10 @@ namespace LibationAvalonia.ViewModels
 {
 	public class LiberateButtonStatus : ViewModelBase, IComparable
 	{
-		public LiberateButtonStatus(bool isSeries)
+		public LiberateButtonStatus(bool isSeries, bool isAbsent)
 		{
 			IsSeries = isSeries;
+			IsAbsent = isAbsent;
 		}
 		public LiberatedStatus BookStatus { get; set; }
 		public LiberatedStatus? PdfStatus { get; set; }
@@ -26,7 +27,10 @@ namespace LibationAvalonia.ViewModels
 				this.RaisePropertyChanged(nameof(ToolTip));
 			}
 		}
-		private bool IsSeries { get; }
+
+		private bool IsAbsent { get; }
+		public bool IsSeries { get; }
+		public bool IsUnavailable => !IsSeries & IsAbsent & (BookStatus is not LiberatedStatus.Liberated || PdfStatus is not null and not LiberatedStatus.Liberated);
 		public Bitmap Image => GetLiberateIcon();
 		public string ToolTip => GetTooltip();
 
@@ -40,6 +44,8 @@ namespace LibationAvalonia.ViewModels
 			if (IsSeries && !second.IsSeries) return -1;
 			else if (!IsSeries && second.IsSeries) return 1;
 			else if (IsSeries && second.IsSeries) return 0;
+			else if (IsUnavailable && !second.IsUnavailable) return 1;
+			else if (!IsUnavailable && second.IsUnavailable) return -1;
 			else if (BookStatus == LiberatedStatus.Liberated && second.BookStatus != LiberatedStatus.Liberated) return -1;
 			else if (BookStatus != LiberatedStatus.Liberated && second.BookStatus == LiberatedStatus.Liberated) return 1;
 			else return BookStatus.CompareTo(second.BookStatus);
@@ -72,11 +78,15 @@ namespace LibationAvalonia.ViewModels
 
 			return GetFromResources($"liberate_{image_lib}{image_pdf}");
 		}
+
 		private string GetTooltip()
 		{
 			if (IsSeries)
 				return Expanded ? "Click to Collpase" : "Click to Expand";
 
+			if (IsUnavailable)
+				return "This book cannot be downloaded\nbecause it wasn't found during\nthe most recent library scan";
+
 			if (BookStatus == LiberatedStatus.Error)
 				return "Book downloaded ERROR";
 

Source/LibationAvalonia/ViewModels/LibraryBookEntry.cs

@@ -44,13 +44,12 @@ namespace LibationAvalonia.ViewModels
 					_pdfStatus = LibraryCommands.Pdf_Status(LibraryBook.Book);
 					lastStatusUpdate = DateTime.Now;
 				}
-				return new LiberateButtonStatus(IsSeries) { BookStatus = _bookStatus, PdfStatus = _pdfStatus };
+				return new LiberateButtonStatus(isSeries: false, LibraryBook.AbsentFromLastScan) { BookStatus = _bookStatus, PdfStatus = _pdfStatus };
 			}
 		}
 
 		public override BookTags BookTags => new() { Tags = string.Join("\r\n", Book.UserDefinedItem.TagsEnumerated) };
 
-		public override bool IsSeries => false;
 		public override bool IsEpisode => Parent is not null;
 		public override bool IsBook => Parent is null;
 
@@ -58,8 +57,22 @@ namespace LibationAvalonia.ViewModels
 
 		public LibraryBookEntry(LibraryBook libraryBook)
 		{
-			LibraryBook = libraryBook;
+			setLibraryBook(libraryBook);
 			LoadCover();
+		}
+
+		public void UpdateLibraryBook(LibraryBook libraryBook)
+		{
+			if (AudibleProductId != libraryBook.Book.AudibleProductId)
+				throw new Exception("Invalid grid entry update. IDs must match");
+
+			UserDefinedItem.ItemChanged -= UserDefinedItem_ItemChanged;
+			setLibraryBook(libraryBook);
+		}
+
+		private void setLibraryBook(LibraryBook libraryBook)
+		{
+			LibraryBook = libraryBook;
 
 			Title = Book.Title;
 			Series = Book.SeriesNames();
@@ -73,10 +86,13 @@ namespace LibationAvalonia.ViewModels
 			Narrators = Book.NarratorNames();
 			Category = string.Join(" > ", Book.CategoriesNames());
 			Misc = GetMiscDisplay(libraryBook);
+			LastDownload = new(Book.UserDefinedItem);
 			LongDescription = GetDescriptionDisplay(Book);
 			Description = TrimTextToWord(LongDescription, 62);
 			SeriesIndex = Book.SeriesLink.FirstOrDefault()?.Index ?? 0;
 
+			this.RaisePropertyChanged(nameof(MyRating));
+			this.RaisePropertyChanged(nameof(Liberate));
 			UserDefinedItem.ItemChanged += UserDefinedItem_ItemChanged;
 		}
 
@@ -112,6 +128,10 @@ namespace LibationAvalonia.ViewModels
 					_pdfStatus = udi.PdfStatus;
 					this.RaisePropertyChanged(nameof(Liberate));
 					break;
+				case nameof(udi.LastDownloaded):
+					LastDownload = new(udi);
+					this.RaisePropertyChanged(nameof(LastDownload));
+					break;
 			}
 		}
 
@@ -134,6 +154,7 @@ namespace LibationAvalonia.ViewModels
 			{ nameof(Description), () => Description },
 			{ nameof(Category), () => Category },
 			{ nameof(Misc), () => Misc },
+			{ nameof(LastDownload), () => LastDownload },
 			{ nameof(BookTags), () => BookTags?.Tags ?? string.Empty },
 			{ nameof(Liberate), () => Liberate },
 			{ nameof(DateAdded), () => DateAdded },

Source/LibationAvalonia/ViewModels/MainWindowViewModel.cs

@@ -1,5 +1,4 @@
 using ApplicationServices;
-using Dinah.Core;
 using LibationFileManager;
 using ReactiveUI;
 
@@ -25,6 +24,9 @@ namespace LibationAvalonia.ViewModels
 		public ProcessQueueViewModel ProcessQueue { get; } = new ProcessQueueViewModel();
 		public ProductsDisplayViewModel ProductsDisplay { get; } = new ProductsDisplayViewModel();
 
+		private double? _downloadProgress = null;
+		public double? DownloadProgress { get => _downloadProgress; set => this.RaiseAndSetIfChanged(ref _downloadProgress, value); }
+
 
 		/// <summary> Library filterting query </summary>
 		public string FilterString { get => _filterString; set => this.RaiseAndSetIfChanged(ref _filterString, value); }
@@ -132,15 +134,9 @@ namespace LibationAvalonia.ViewModels
 			set
 			{
 				this.RaiseAndSetIfChanged(ref _queueOpen, value);
-				QueueHideButtonText = _queueOpen? "❱❱❱" : "❰❰❰";
-				this.RaisePropertyChanged(nameof(QueueHideButtonText));
 			}
 		}
 
-		/// <summary> The Process Queue's Expand/Collapse button display text </summary>
-		public string QueueHideButtonText { get; private set; }
-
-
 
 		/// <summary> The number of books visible in the Product Display </summary>
 		public int VisibleCount
@@ -169,18 +165,6 @@ namespace LibationAvalonia.ViewModels
 			{
 				this.RaiseAndSetIfChanged(ref _libraryStats, value);
 
-				var backupsCountText
-					= !LibraryStats.HasBookResults ? "No books. Begin by importing your library"
-					: !LibraryStats.HasPendingBooks ? $"All {"book".PluralizeWithCount(LibraryStats.booksFullyBackedUp)} backed up"
-					: $"BACKUPS: No progress: {LibraryStats.booksNoProgress}  In process: {LibraryStats.booksDownloadedOnly}  Fully backed up: {LibraryStats.booksFullyBackedUp} {(LibraryStats.booksError > 0 ? $"  Errors : {LibraryStats.booksError}" : "")}";
-
-				var pdfCountText
-					= !LibraryStats.HasPdfResults ? ""
-					: LibraryStats.pdfsNotDownloaded == 0 ? $"  |  All {LibraryStats.pdfsDownloaded} PDFs downloaded"
-					: $"  |  PDFs: NOT d/l'ed: {LibraryStats.pdfsNotDownloaded} Downloaded: {LibraryStats.pdfsDownloaded}";
-
-				StatusCountText = backupsCountText + pdfCountText;
-
 				BookBackupsToolStripText
 					= LibraryStats.HasPendingBooks
 					? $"Begin _Book and PDF Backups: {LibraryStats.PendingBooks} remaining"
@@ -191,21 +175,17 @@ namespace LibationAvalonia.ViewModels
 					? $"Begin _PDF Only Backups: {LibraryStats.pdfsNotDownloaded} remaining"
 					: "All PDFs have been downloaded";
 
-				this.RaisePropertyChanged(nameof(StatusCountText));
 				this.RaisePropertyChanged(nameof(BookBackupsToolStripText));
 				this.RaisePropertyChanged(nameof(PdfBackupsToolStripText));
 			}
 		}
 
-		/// <summary> Bottom-left library statistics display text </summary>
-		public string StatusCountText { get; private set; } = "[Calculating backed up book quantities]  |  [Calculating backed up PDFs]";
 		/// <summary> The "Begin Book and PDF Backup" menu item header text </summary>
 		public string BookBackupsToolStripText { get; private set; } = "Begin _Book and PDF Backups: 0";
 		/// <summary> The "Begin PDF Only Backup" menu item header text </summary>
 		public string PdfBackupsToolStripText { get; private set; } = "Begin _PDF Only Backups: 0";
 
 
-
 		/// <summary> The number of books visible in the Products Display that have not yet been liberated </summary>
 		public int VisibleNotLiberated
 		{

Source/LibationAvalonia/ViewModels/ProcessQueueViewModel.cs

@@ -1,4 +1,5 @@
 using ApplicationServices;
+using Avalonia.Collections;
 using Avalonia.Controls;
 using Avalonia.Threading;
 using DataLayer;
@@ -16,9 +17,8 @@ namespace LibationAvalonia.ViewModels
 	public class ProcessQueueViewModel : ViewModelBase, ILogForm
 	{
 		public ObservableCollection<LogEntry> LogEntries { get; } = new();
-		public TrackedQueue<ProcessBookViewModel> Items { get; } = new();
-
-		private TrackedQueue<ProcessBookViewModel> Queue => Items;
+		public AvaloniaList<ProcessBookViewModel> Items { get; } = new();
+		public TrackedQueue<ProcessBookViewModel> Queue { get; }
 		public ProcessBookViewModel SelectedItem { get; set; }
 		public Task QueueRunner { get; private set; }
 		public bool Running => !QueueRunner?.IsCompleted ?? false;
@@ -28,6 +28,7 @@ namespace LibationAvalonia.ViewModels
 		public ProcessQueueViewModel()
 		{
 			Logger = LogMe.RegisterForm(this);
+			Queue = new(Items);
 			Queue.QueuededCountChanged += Queue_QueuededCountChanged;
 			Queue.CompletedCountChanged += Queue_CompletedCountChanged;
 
@@ -88,19 +89,19 @@ namespace LibationAvalonia.ViewModels
 
 		public decimal SpeedLimitIncrement { get; private set; }
 
-		private void Queue_CompletedCountChanged(object sender, int e)
+		private async void Queue_CompletedCountChanged(object sender, int e)
 		{
 			int errCount = Queue.Completed.Count(p => p.Result is ProcessBookResult.FailedAbort or ProcessBookResult.FailedSkip or ProcessBookResult.FailedRetry or ProcessBookResult.ValidationFail);
 			int completeCount = Queue.Completed.Count(p => p.Result is ProcessBookResult.Success);
 
 			ErrorCount = errCount;
 			CompletedCount = completeCount;
-			Dispatcher.UIThread.Post(() => this.RaisePropertyChanged(nameof(Progress)));
+			await Dispatcher.UIThread.InvokeAsync(() => this.RaisePropertyChanged(nameof(Progress)));
 		}
-		private void Queue_QueuededCountChanged(object sender, int cueCount)
+		private async void Queue_QueuededCountChanged(object sender, int cueCount)
 		{
 			QueuedCount = cueCount;
-			Dispatcher.UIThread.Post(() => this.RaisePropertyChanged(nameof(Progress)));
+			await Dispatcher.UIThread.InvokeAsync(() => this.RaisePropertyChanged(nameof(Progress)));
 		}
 
 		public void WriteLine(string text)

Source/LibationAvalonia/ViewModels/ProductsDisplayViewModel.cs

@@ -20,11 +20,11 @@ namespace LibationAvalonia.ViewModels
 		public event EventHandler<int> RemovableCountChanged;
 
 		/// <summary>Backing list of all grid entries</summary>
-		private readonly List<GridEntry> SOURCE = new();
+		private readonly AvaloniaList<GridEntry> SOURCE = new();
 		/// <summary>Grid entries included in the filter set. If null, all grid entries are shown</summary>
 		private List<GridEntry> FilteredInGridEntries;
 		public string FilterString { get; private set; }
-		public DataGridCollectionView GridEntries { get; }
+		public DataGridCollectionView GridEntries { get; private set; }
 
 		private bool _removeColumnVisivle;
 		public bool RemoveColumnVisivle { get => _removeColumnVisivle; private set => this.RaiseAndSetIfChanged(ref _removeColumnVisivle, value); }
@@ -42,59 +42,60 @@ namespace LibationAvalonia.ViewModels
 		public ProductsDisplayViewModel()
 		{
 			SearchEngineCommands.SearchEngineUpdated += SearchEngineCommands_SearchEngineUpdated;
-			GridEntries = new(SOURCE);
-			GridEntries.Filter = CollectionFilter;
+			VisibleCountChanged?.Invoke(this, 0);
+		}
 
-			GridEntries.CollectionChanged += (s, e)
-				=> VisibleCountChanged?.Invoke(this, GridEntries.OfType<LibraryBookEntry>().Count());
+		private static readonly System.Reflection.MethodInfo SetFlagsMethod;
+
+		/// <summary>
+		/// Tells the <see cref="DataGridCollectionView"/> whether it should process changes to the underlying collection
+		/// </summary>
+		/// <remarks> DataGridCollectionView.CollectionViewFlags.ShouldProcessCollectionChanged = 4</remarks>
+		private void SetShouldProcessCollectionChanged(bool flagSet)
+			=> SetFlagsMethod.Invoke(GridEntries, new object[] { 4, flagSet });
+
+		static ProductsDisplayViewModel()
+		{
+			/*
+			 * When a book is removed from the library, SearchEngineUpdated is fired before LibrarySizeChanged, so
+			 * the book is removed from the filtered set and the grid is refreshed before RemoveBooks() is ever
+			 * called.
+			 * 
+			 * To remove an item from DataGridCollectionView, it must be be in the current filtered view. If it's
+			 * not and you try to remove the book from the source list, the source will fire NotifyCollectionChanged
+			 * on an invalid item and the DataGridCollectionView will throw an exception. There are two ways to
+			 * remove an item that is filtered out of the DataGridCollectionView:
+			 * 
+			 * (1)  Re-add the item to the filtered-in list and refresh the grid so DataGridCollectionView knows
+			 *		that the item is present. This causes the whole grid to flicker to refresh twice in rapid
+			 *		succession, which is undesirable.
+			 *		
+			 * (2)  Remove it from the underlying collection and suppress NotifyCollectionChanged. This is the
+			 *		method used. Steps to complete a removal using this method:
+			 *		
+			 *		(a)	Set DataGridCollectionView.CollectionViewFlags.ShouldProcessCollectionChanged to false.
+			 *		(b) Remove the item from the source list. The source will fire NotifyCollectionChanged, but the
+			 *			DataGridCollectionView will ignore it.
+			 *		(c) Reset the flag to true.
+			 */
+
+			SetFlagsMethod =
+				typeof(DataGridCollectionView)
+				.GetMethod("SetFlag", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
 		}
 
 		#region Display Functions
 
-		/// <summary>
-		/// Call when there's been a change to the library
-		/// </summary>
-		public async Task DisplayBooksAsync(List<LibraryBook> dbBooks)
+		internal void BindToGrid(List<LibraryBook> dbBooks)
 		{
-			try
+			GridEntries = new(SOURCE)
 			{
-				var existingSeriesEntries = SOURCE.SeriesEntries().ToList();
+				Filter = CollectionFilter
+			};
 
-				FilteredInGridEntries?.Clear();
-				SOURCE.Clear();
-				SOURCE.AddRange(CreateGridEntries(dbBooks));
+			GridEntries.CollectionChanged += (_, _)
+				=> VisibleCountChanged?.Invoke(this, GridEntries.OfType<LibraryBookEntry>().Count());
 
-				//If replacing the list, preserve user's existing collapse/expand
-				//state. When resetting a list, default state is cosed.
-				foreach (var series in existingSeriesEntries)
-				{
-					var sEntry = SOURCE.FirstOrDefault(ge => ge.AudibleProductId == series.AudibleProductId);
-					if (sEntry is SeriesEntry se)
-						se.Liberate.Expanded = series.Liberate.Expanded;
-				}
-
-				//Run query on new list
-				FilteredInGridEntries = QueryResults(SOURCE, FilterString);
-
-				await refreshGrid();
-
-			}
-			catch (Exception ex)
-			{
-				Serilog.Log.Error(ex, "Error displaying library in {0}", nameof(ProductsDisplayViewModel));
-			}
-		}
-
-		private async Task refreshGrid()
-		{
-			if (GridEntries.IsEditingItem)
-				await Dispatcher.UIThread.InvokeAsync(GridEntries.CommitEdit);
-
-			await Dispatcher.UIThread.InvokeAsync(GridEntries.Refresh);
-		}
-
-		private static List<GridEntry> CreateGridEntries(IEnumerable<LibraryBook> dbBooks)
-		{
 			var geList = dbBooks
 				.Where(lb => lb.Book.IsProduct())
 				.Select(b => new LibraryBookEntry(b))
@@ -103,26 +104,159 @@ namespace LibationAvalonia.ViewModels
 
 			var episodes = dbBooks.Where(lb => lb.Book.IsEpisodeChild());
 
-			foreach (var parent in dbBooks.Where(lb => lb.Book.IsEpisodeParent()))
+			var seriesBooks = dbBooks.Where(lb => lb.Book.IsEpisodeParent()).ToList();
+
+			foreach (var parent in seriesBooks)
 			{
 				var seriesEpisodes = episodes.FindChildren(parent);
 
 				if (!seriesEpisodes.Any()) continue;
 
 				var seriesEntry = new SeriesEntry(parent, seriesEpisodes);
+				seriesEntry.Liberate.Expanded = false;
 
 				geList.Add(seriesEntry);
 				geList.AddRange(seriesEntry.Children);
 			}
 
-			var bookList =  geList.OrderByDescending(e => e.DateAdded).ToList();
+			//Create the filtered-in list before adding entries to avoid a refresh
+			FilteredInGridEntries = QueryResults(geList, FilterString);
+			SOURCE.AddRange(geList.OrderByDescending(e => e.DateAdded));
+		}
 
-			//ListIndex is used by RowComparer to make column sort stable
-			int index = 0;
-			foreach (GridEntry di in bookList)
-				di.ListIndex = index++;
+		/// <summary>
+		/// Call when there's been a change to the library
+		/// </summary>
+		internal async Task UpdateGridAsync(List<LibraryBook> dbBooks)
+		{
+			#region Add new or update existing grid entries
 
-			return bookList;
+			//Add absent entries to grid, or update existing entry
+			var allEntries = SOURCE.BookEntries();
+			var seriesEntries = SOURCE.SeriesEntries().ToList();
+			var parentedEpisodes = dbBooks.ParentedEpisodes();
+
+			await Dispatcher.UIThread.InvokeAsync(() =>
+			{
+				foreach (var libraryBook in dbBooks.OrderBy(e => e.DateAdded))
+				{
+					var existingEntry = allEntries.FindByAsin(libraryBook.Book.AudibleProductId);
+
+					if (libraryBook.Book.IsProduct())
+						UpsertBook(libraryBook, existingEntry);
+					else if (parentedEpisodes.Any(lb => lb == libraryBook))
+						//Only try to add or update is this LibraryBook is a know child of a parent
+						UpsertEpisode(libraryBook, existingEntry, seriesEntries, dbBooks);
+				}
+			});
+
+			#endregion
+
+			#region Remove entries no longer in the library
+
+			//Rapid successive book removals will cause changes to SOURCE after the update has
+			//begun but before it has completed, so perform all updates on a copy of the list.
+			var sourceSnapshot = SOURCE.ToList();
+
+			// remove deleted from grid.
+			// note: actual deletion from db must still occur via the RemoveBook feature. deleting from audible will not trigger this
+			var removedBooks =
+				sourceSnapshot
+				.BookEntries()
+				.ExceptBy(dbBooks.Select(lb => lb.Book.AudibleProductId), ge => ge.AudibleProductId);
+
+			//Remove books in series from their parents' Children list
+			foreach (var removed in removedBooks.Where(b => b.Parent is not null))
+				removed.Parent.RemoveChild(removed);
+
+			//Remove series that have no children
+			var removedSeries = sourceSnapshot.EmptySeries();
+
+			await Dispatcher.UIThread.InvokeAsync(() => RemoveBooks(removedBooks, removedSeries));
+
+			#endregion
+
+			await Filter(FilterString);
+			GC.Collect(GC.MaxGeneration, GCCollectionMode.Aggressive, true, true);
+		}
+
+		private void RemoveBooks(IEnumerable<LibraryBookEntry> removedBooks, IEnumerable<SeriesEntry> removedSeries)
+		{
+			foreach (var removed in removedBooks.Cast<GridEntry>().Concat(removedSeries).Where(b => b is not null).ToList())
+			{
+				if (GridEntries.PassesFilter(removed))
+					GridEntries.Remove(removed);
+				else
+				{
+					SetShouldProcessCollectionChanged(false);
+					SOURCE.Remove(removed);
+					SetShouldProcessCollectionChanged(true);
+				}
+			}
+		}
+
+		private void UpsertBook(LibraryBook book, LibraryBookEntry existingBookEntry)
+		{
+			if (existingBookEntry is null)
+				// Add the new product to top
+				SOURCE.Insert(0, new LibraryBookEntry(book));
+			else
+				// update existing
+				existingBookEntry.UpdateLibraryBook(book);
+		}
+
+		private void UpsertEpisode(LibraryBook episodeBook, LibraryBookEntry existingEpisodeEntry, List<SeriesEntry> seriesEntries, IEnumerable<LibraryBook> dbBooks)
+		{
+			if (existingEpisodeEntry is null)
+			{
+				LibraryBookEntry episodeEntry;
+
+				var seriesEntry = seriesEntries.FindSeriesParent(episodeBook);
+
+				if (seriesEntry is null)
+				{
+					//Series doesn't exist yet, so create and add it
+					var seriesBook = dbBooks.FindSeriesParent(episodeBook);
+
+					if (seriesBook is null)
+					{
+						//This is only possible if the user's db  has some malformed
+						//entries from earlier Libation releases that could not be
+						//automatically fixed. Log, but don't throw.
+						Serilog.Log.Logger.Error("Episode={0}, Episode Series: {1}", episodeBook, episodeBook.Book.SeriesNames());
+						return;
+					}
+
+					seriesEntry = new SeriesEntry(seriesBook, new[] { episodeBook });
+					seriesEntries.Add(seriesEntry);
+
+					episodeEntry = seriesEntry.Children[0];
+					seriesEntry.Liberate.Expanded = true;
+					SOURCE.Insert(0, seriesEntry);
+				}
+				else
+				{
+					//Series exists. Create and add episode child then update the SeriesEntry
+					episodeEntry = new(episodeBook) { Parent = seriesEntry };
+					seriesEntry.Children.Add(episodeEntry);
+					var seriesBook = dbBooks.Single(lb => lb.Book.AudibleProductId == seriesEntry.LibraryBook.Book.AudibleProductId);
+					seriesEntry.UpdateLibraryBook(seriesBook);
+				}
+
+				//Add episode to the grid beneath the parent
+				int seriesIndex = SOURCE.IndexOf(seriesEntry);
+				SOURCE.Insert(seriesIndex + 1, episodeEntry);
+			}
+			else
+				existingEpisodeEntry.UpdateLibraryBook(episodeBook);
+		}
+
+		private async Task refreshGrid()
+		{
+			if (GridEntries.IsEditingItem)
+				await Dispatcher.UIThread.InvokeAsync(GridEntries.CommitEdit);
+
+			await Dispatcher.UIThread.InvokeAsync(GridEntries.Refresh);
 		}
 
 		public async Task ToggleSeriesExpanded(SeriesEntry seriesEntry)
@@ -138,9 +272,6 @@ namespace LibationAvalonia.ViewModels
 
 		public async Task Filter(string searchString)
 		{
-			if (searchString == FilterString)
-				return;
-
 			FilterString = searchString;
 
 			if (SOURCE.Count == 0)
@@ -206,10 +337,10 @@ namespace LibationAvalonia.ViewModels
 			if (selectedBooks.Count == 0)
 				return;
 
-			var libraryBooks = selectedBooks.Select(rge => rge.LibraryBook).ToList();
+			var booksToRemove = selectedBooks.Select(rge => rge.LibraryBook).ToList();
 			var result = await MessageBox.ShowConfirmationDialog(
 				null,
-				libraryBooks,
+				booksToRemove,
 				// do not use `$` string interpolation. See impl.
 				"Are you sure you want to remove {0} from Libation's library?",
 				"Remove books from Libation?");
@@ -220,8 +351,6 @@ namespace LibationAvalonia.ViewModels
 			foreach (var book in selectedBooks)
 				book.PropertyChanged -= GridEntry_PropertyChanged;
 
-			var idsToRemove = libraryBooks.Select(lb => lb.Book.AudibleProductId).ToList();
-
 			void BindingList_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
 			{
 				if (e.Action != System.Collections.Specialized.NotifyCollectionChangedAction.Reset)
@@ -240,7 +369,7 @@ namespace LibationAvalonia.ViewModels
 
 			//The RemoveBooksAsync will fire LibrarySizeChanged, which calls ProductsDisplay2.Display(),
 			//so there's no need to remove books from the grid display here.
-			var removeLibraryBooks = await LibraryCommands.RemoveBooksAsync(idsToRemove);
+			await booksToRemove.RemoveBooksAsync();
 
 			RemovableCountChanged?.Invoke(this, 0);
 		}

Source/LibationAvalonia/ViewModels/QueryExtensions.cs

@@ -14,6 +14,12 @@ namespace LibationAvalonia.ViewModels
 		public static IEnumerable<SeriesEntry> SeriesEntries(this IEnumerable<GridEntry> gridEntries)
 			=> gridEntries.OfType<SeriesEntry>();
 
+		public static T? FindByAsin<T>(this IEnumerable<T> gridEntries, string audibleProductID) where T : GridEntry
+			=> gridEntries.FirstOrDefault(i => i.AudibleProductId == audibleProductID);
+
+		public static IEnumerable<SeriesEntry> EmptySeries(this IEnumerable<GridEntry> gridEntries)
+			=> gridEntries.SeriesEntries().Where(i => i.Children.Count == 0);
+
 		public static SeriesEntry? FindSeriesParent(this IEnumerable<GridEntry> gridEntries, LibraryBook seriesEpisode)
 		{
 			if (seriesEpisode.Book.SeriesLink is null) return null;

Source/LibationAvalonia/ViewModels/SeriesEntry.cs

@@ -46,7 +46,6 @@ namespace LibationAvalonia.ViewModels
 		public override LiberateButtonStatus Liberate { get; }
 		public override BookTags BookTags { get; } = new();
 
-		public override bool IsSeries => true;
 		public override bool IsEpisode => false;
 		public override bool IsBook => false;
 
@@ -54,17 +53,38 @@ namespace LibationAvalonia.ViewModels
 
 		public SeriesEntry(LibraryBook parent, IEnumerable<LibraryBook> children)
 		{
-			Liberate = new LiberateButtonStatus(IsSeries);
+			Liberate = new LiberateButtonStatus(isSeries: true, isAbsent: false);
 			SeriesIndex = -1;
-			LibraryBook = parent;
-
-			LoadCover();
 
 			Children = children
 				.Select(c => new LibraryBookEntry(c) { Parent = this })
 				.OrderBy(c => c.SeriesIndex)
 				.ToList();
 
+			setLibraryBook(parent);
+			LoadCover();
+		}
+
+		public void RemoveChild(LibraryBookEntry lbe)
+		{
+			Children.Remove(lbe);
+			PurchaseDate = Children.Min(c => c.LibraryBook.DateAdded).ToString("d");
+			int bookLenMins = Children.Sum(c => c.LibraryBook.Book.LengthInMinutes);
+			Length = bookLenMins == 0 ? "" : $"{bookLenMins / 60} hr {bookLenMins % 60} min";
+		}
+
+		public void UpdateLibraryBook(LibraryBook libraryBook)
+		{
+			if (AudibleProductId != libraryBook.Book.AudibleProductId)
+				throw new Exception("Invalid grid entry update. IDs must match");
+
+			setLibraryBook(libraryBook);
+		}
+
+		private void setLibraryBook(LibraryBook libraryBook)
+		{
+			LibraryBook = libraryBook;
+
 			Title = Book.Title;
 			Series = Book.SeriesNames();
 			//Ratings are changed using Update(), which is a problem for Avalonia data bindings because
@@ -75,12 +95,15 @@ namespace LibationAvalonia.ViewModels
 			Narrators = Book.NarratorNames();
 			Category = string.Join(" > ", Book.CategoriesNames());
 			Misc = GetMiscDisplay(LibraryBook);
+			LastDownload = new();
 			LongDescription = GetDescriptionDisplay(Book);
 			Description = TrimTextToWord(LongDescription, 62);
 
 			PurchaseDate = Children.Min(c => c.LibraryBook.DateAdded).ToString("d");
 			int bookLenMins = Children.Sum(c => c.LibraryBook.Book.LengthInMinutes);
 			Length = bookLenMins == 0 ? "" : $"{bookLenMins / 60} hr {bookLenMins % 60} min";
+
+			this.RaisePropertyChanged(nameof(MyRating));
 		}
 
 
@@ -101,6 +124,7 @@ namespace LibationAvalonia.ViewModels
 			{ nameof(Description), () => Description },
 			{ nameof(Category), () => Category },
 			{ nameof(Misc), () => Misc },
+			{ nameof(LastDownload), () => LastDownload },
 			{ nameof(BookTags), () => BookTags?.Tags ?? string.Empty },
 			{ nameof(Liberate), () => Liberate },
 			{ nameof(DateAdded), () => DateAdded },

Source/LibationAvalonia/Views/MainWindow.ProcessQueue.cs

@@ -47,6 +47,23 @@ namespace LibationAvalonia.Views
 				Serilog.Log.Logger.Error(ex, "An error occurred while handling the stop light button click for {libraryBook}", libraryBook);
 			}
 		}
+
+		public void ProductsDisplay_ConvertToMp3Clicked(object sender, LibraryBook libraryBook)
+		{
+			try
+			{
+				if (libraryBook.Book.UserDefinedItem.BookStatus is LiberatedStatus.Liberated)
+				{
+					Serilog.Log.Logger.Information("Begin single pdf backup of {libraryBook}", libraryBook);
+					SetQueueCollapseState(false);
+					_viewModel.ProcessQueue.AddConvertMp3(libraryBook);
+				}
+			}
+			catch (Exception ex)
+			{
+				Serilog.Log.Logger.Error(ex, "An error occurred while handling the stop light button click for {libraryBook}", libraryBook);
+			}
+		}
 		private void SetQueueCollapseState(bool collapsed)
 		{
 			_viewModel.QueueOpen = !collapsed;

Source/LibationAvalonia/Views/MainWindow.RemoveBooks.cs

@@ -1,4 +1,5 @@
 using AudibleUtilities;
+using LibationAvalonia.Dialogs;
 using System;
 using System.Linq;
 
@@ -15,6 +16,12 @@ namespace LibationAvalonia.Views
 			_viewModel.RemoveButtonsVisible = false;
 		}
 
+		public async void openTrashBinToolStripMenuItem_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
+		{
+			var trash = new TrashBinDialog();
+			await trash.ShowDialog(this);
+		}
+
 		public void removeLibraryBooksToolStripMenuItem_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
 		{
 			// if 0 accounts, this will not be visible

Source/LibationAvalonia/Views/MainWindow.ScanAuto.cs

@@ -9,7 +9,6 @@ using System.Linq;
 
 namespace LibationAvalonia.Views
 {
-	//DONE
 	public partial class MainWindow
 	{
 		private InterruptableTimer autoScanTimer;
@@ -17,11 +16,7 @@ namespace LibationAvalonia.Views
 		private void Configure_ScanAuto()
 		{
 			// creating InterruptableTimer inside 'Configure_' is a break from the pattern. As long as no one else needs to access or subscribe to it, this is ok
-			var hours = 0;
-			var minutes = 5;
-			var seconds = 0;
-			var _5_minutes = new TimeSpan(hours, minutes, seconds);
-			autoScanTimer = new InterruptableTimer(_5_minutes);
+			autoScanTimer = new InterruptableTimer(TimeSpan.FromMinutes(5));
 
 			// subscribe as async/non-blocking. I'd actually rather prefer blocking but real-world testing found that caused a deadlock in the AudibleAPI
 			autoScanTimer.Elapsed += async (_, __) =>
@@ -44,9 +39,9 @@ namespace LibationAvalonia.Views
 			};
 
 			_viewModel.AutoScanChecked = Configuration.Instance.AutoScan;
-
+			
 			// if enabled: begin on load
-			Load += startAutoScan;
+			Opened += startAutoScan;
 
 			// if new 'default' account is added, run autoscan
 			AccountsSettingsPersister.Saving += accountsPreSave;

Source/LibationAvalonia/Views/MainWindow.Update.cs

@@ -1,87 +0,0 @@
-using AppScaffolding;
-using LibationAvalonia.Dialogs;
-using LibationFileManager;
-using System;
-using System.IO;
-using System.Threading.Tasks;
-
-namespace LibationAvalonia.Views
-{
-    public partial class MainWindow
-    {
-		private void Configure_Update()
-		{
-			Opened += async (_, _) => await checkForUpdates();
-		}
-
-		private async Task checkForUpdates()
-		{
-			async Task<string> downloadUpdate(UpgradeProperties upgradeProperties)
-			{
-				if (upgradeProperties.ZipUrl is null)
-				{
-					Serilog.Log.Logger.Warning("Download link for new version not found");
-					return null;
-				}
-
-				//Silently download the update in the background, save it to a temp file.
-
-				var zipFile = Path.Combine(Path.GetTempPath(), Path.GetFileName(upgradeProperties.ZipUrl));
-
-				Serilog.Log.Logger.Information($"Downloading {zipFile}");
-
-				try
-				{
-					System.Net.Http.HttpClient cli = new();
-					using var fs = File.OpenWrite(zipFile);
-					using var dlStream = await cli.GetStreamAsync(new Uri(upgradeProperties.ZipUrl));
-					await dlStream.CopyToAsync(fs);
-				}
-				catch (Exception ex)
-				{
-					Serilog.Log.Logger.Error(ex, "Failed to download the update: {pdate}", upgradeProperties.ZipUrl);
-					return null;
-				}
-				return zipFile;
-			}
-
-			try
-			{
-				var upgradeProperties = await Task.Run(LibationScaffolding.GetLatestRelease);
-				if (upgradeProperties is null) return;
-
-				const string ignoreUpdate = "IgnoreUpdate";
-				var config = Configuration.Instance;
-
-				if (config.GetString(propertyName: ignoreUpdate) == upgradeProperties.LatestRelease.ToString())
-					return;
-
-				var interop = InteropFactory.Create();
-
-				if (!interop.CanUpdate)
-					Serilog.Log.Logger.Information("Can't perform update automatically");
-
-				var notificationResult = await new UpgradeNotificationDialog(upgradeProperties, interop.CanUpdate).ShowDialog<DialogResult>(this);
-
-				if (notificationResult == DialogResult.Ignore)
-					config.SetString(upgradeProperties.LatestRelease.ToString(), ignoreUpdate);
-
-				if (notificationResult != DialogResult.OK) return;
-
-				//Download the update file in the background,
-				string updateBundle = await downloadUpdate(upgradeProperties);
-
-				if (string.IsNullOrEmpty(updateBundle) || !File.Exists(updateBundle)) return;
-
-				//Install the update
-				Serilog.Log.Logger.Information($"Begin running auto-updater");
-				interop.InstallUpdate(updateBundle);
-				Serilog.Log.Logger.Information($"Completed running auto-updater");
-			}
-			catch (Exception ex)
-			{
-				Serilog.Log.Logger.Error(ex, "An error occured while checking for app updates.");
-			}
-		}
-    }
-}

Source/LibationAvalonia/Views/MainWindow.Upgrade.cs

@@ -0,0 +1,34 @@
+using Avalonia.Threading;
+using LibationAvalonia.Dialogs;
+using LibationUiBase;
+using System.Threading.Tasks;
+
+namespace LibationAvalonia.Views
+{
+    public partial class MainWindow
+    {
+		private void Configure_Upgrade()
+		{
+			setProgressVisible(false);
+#if !DEBUG
+			async Task upgradeAvailable(UpgradeEventArgs e)
+			{
+				var notificationResult = await new UpgradeNotificationDialog(e.UpgradeProperties, e.CapUpgrade).ShowDialogAsync(this);
+
+				e.Ignore = notificationResult == DialogResult.Ignore;
+				e.InstallUpgrade = notificationResult == DialogResult.OK;
+			}
+
+			var upgrader = new Upgrader();
+			upgrader.DownloadProgress += async (_, e) => await Dispatcher.UIThread.InvokeAsync(() => _viewModel.DownloadProgress = e.ProgressPercentage);
+			upgrader.DownloadBegin += async (_, _) => await Dispatcher.UIThread.InvokeAsync(() => setProgressVisible(true));
+			upgrader.DownloadCompleted += async (_, _) => await Dispatcher.UIThread.InvokeAsync(() => setProgressVisible(false));
+
+			Opened += async (_, _) => await upgrader.CheckForUpgradeAsync(upgradeAvailable);
+#endif
+		}
+
+		private void setProgressVisible(bool visible) => _viewModel.DownloadProgress = visible ? 0 : null;
+
+	}
+}

Source/LibationAvalonia/Views/MainWindow.VisibleBooks.cs

@@ -144,11 +144,8 @@ namespace LibationAvalonia.Views
 				"Remove books from Libation?",
 				MessageBoxDefaultButton.Button2);
 
-			if (confirmationResult != DialogResult.Yes)
-				return;
-
-			var visibleIds = visibleLibraryBooks.Select(lb => lb.Book.AudibleProductId).ToList();
-			await LibraryCommands.RemoveBooksAsync(visibleIds);
+			if (confirmationResult is DialogResult.Yes)
+				await visibleLibraryBooks.RemoveBooksAsync();
 		}
 		public async void ProductsDisplay_VisibleCountChanged(object sender, int qty)
 		{
@@ -157,9 +154,9 @@ namespace LibationAvalonia.Views
 			await Dispatcher.UIThread.InvokeAsync(setLiberatedVisibleMenuItem);
 		}
 		void setLiberatedVisibleMenuItem()
-			=> _viewModel.VisibleNotLiberated
-				= _viewModel.ProductsDisplay
-				.GetVisibleBookEntries()
-				.Count(lb => lb.Book.UserDefinedItem.BookStatus == LiberatedStatus.NotLiberated);
+		{
+			var libraryStats = LibraryCommands.GetCounts(_viewModel.ProductsDisplay.GetVisibleBookEntries());
+			_viewModel.VisibleNotLiberated = libraryStats.PendingBooks;
+		}
 	}
 }

Source/LibationAvalonia/Views/MainWindow.axaml

@@ -131,6 +131,7 @@
 						<MenuItem Click="accountsToolStripMenuItem_Click" Header="_Accounts..." />
 						<MenuItem Click="basicSettingsToolStripMenuItem_Click" Header="_Settings..." />
 						<Separator />
+						<MenuItem Click="openTrashBinToolStripMenuItem_Click" Header="Trash Bin" />
 						<MenuItem Click="launchHangoverToolStripMenuItem_Click" Header="Launch _Hangover" />
 						<Separator />
 						<MenuItem Click="aboutToolStripMenuItem_Click" Header="A_bout..." />
@@ -172,7 +173,12 @@
 
 				<StackPanel Grid.Column="2" Height="30" Orientation="Horizontal">
 					<Button Click="filterBtn_Click" Height="30" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" Content="Filter"/>
-					<Button Padding="5,0,5,0" Click="ToggleQueueHideBtn_Click" Content="{Binding QueueHideButtonText}"/>
+					<Button Padding="5,0,5,0" Click="ToggleQueueHideBtn_Click">
+						<Panel>
+							<Image Stretch="None" IsVisible="{Binding !QueueOpen}" Source="/Assets/Arrows_left.png" />
+							<Image Stretch="None" IsVisible="{Binding QueueOpen}" Source="/Assets/Arrows_right.png" />
+						</Panel>
+					</Button>
 				</StackPanel>
 
 			</Grid>
@@ -188,14 +194,22 @@
 					<views:ProductsDisplay
 						Name="productsDisplay"
 						DataContext="{Binding ProductsDisplay}"						
-						LiberateClicked="ProductsDisplay_LiberateClicked"/>				
+						LiberateClicked="ProductsDisplay_LiberateClicked"
+						ConvertToMp3Clicked="ProductsDisplay_ConvertToMp3Clicked" />				
 				</SplitView>
 			</Border>
 
 			<!-- Bottom Status Strip -->
-			<Grid Grid.Row="3" Margin="0,10,0,0" VerticalAlignment="Bottom" ColumnDefinitions="*,Auto">
-				<TextBlock FontSize="14" Grid.Column="0" Text="{Binding VisibleCountText}" VerticalAlignment="Center" />
-				<TextBlock FontSize="14" Grid.Column="1" Text="{Binding StatusCountText}" VerticalAlignment="Center" HorizontalAlignment="Right" />		
+			<Grid Grid.Row="3" Margin="0,10,0,0" VerticalAlignment="Bottom" ColumnDefinitions="Auto,Auto,*,Auto">
+				<Grid.Styles>
+					<Style Selector="ProgressBar:horizontal">
+						<Setter Property="MinWidth" Value="100" />
+					</Style>
+				</Grid.Styles>
+				<TextBlock FontSize="14" Grid.Column="0" Text="Upgrading:" VerticalAlignment="Center" IsVisible="{Binding DownloadProgress, Converter={x:Static ObjectConverters.IsNotNull}}" />
+				<ProgressBar Grid.Column="1" Margin="5,0,10,0" VerticalAlignment="Stretch" Width="100" Value="{Binding DownloadProgress}" IsVisible="{Binding DownloadProgress, Converter={x:Static ObjectConverters.IsNotNull}}"/>
+				<TextBlock FontSize="14" Grid.Column="2" Text="{Binding VisibleCountText}" VerticalAlignment="Center" />
+				<TextBlock FontSize="14" Grid.Column="3" Text="{Binding LibraryStats.StatusString}" VerticalAlignment="Center" />		
 			</Grid>
 		</Grid>
 	</Border>

Source/LibationAvalonia/Views/MainWindow.axaml.cs

@@ -40,9 +40,7 @@ namespace LibationAvalonia.Views
 			Configure_Export();
 			Configure_Settings();
 			Configure_ProcessQueue();
-#if !DEBUG
-			Configure_Update();
-#endif
+			Configure_Upgrade();
 			Configure_Filter();
 			// misc which belongs in winforms app but doesn't have a UI element
 			Configure_NonUI();
@@ -53,7 +51,7 @@ namespace LibationAvalonia.Views
 			{
 				this.LibraryLoaded += MainWindow_LibraryLoaded;
 
-				LibraryCommands.LibrarySizeChanged += async (_, _) => await _viewModel.ProductsDisplay.DisplayBooksAsync(DbContexts.GetLibrary_Flat_NoTracking(includeParents: true));
+				LibraryCommands.LibrarySizeChanged += async (_, _) => await _viewModel.ProductsDisplay.UpdateGridAsync(DbContexts.GetLibrary_Flat_NoTracking(includeParents: true));
 				Closing += (_, _) => this.SaveSizeAndLocation(Configuration.Instance);
 			}
 			Closing += MainWindow_Closing;
@@ -69,7 +67,7 @@ namespace LibationAvalonia.Views
 			if (QuickFilters.UseDefault)
 				await performFilter(QuickFilters.Filters.FirstOrDefault());
 
-			await _viewModel.ProductsDisplay.DisplayBooksAsync(dbBooks);
+			_viewModel.ProductsDisplay.BindToGrid(dbBooks);
 		}
 
 		private void InitializeComponent()

Source/LibationAvalonia/Views/ProcessQueueControl.axaml.cs

@@ -15,7 +15,7 @@ namespace LibationAvalonia.Views
 {
 	public partial class ProcessQueueControl : UserControl
     {
-		private TrackedQueue<ProcessBookViewModel> Queue => _viewModel.Items;
+		private TrackedQueue<ProcessBookViewModel> Queue => _viewModel.Queue;
 		private ProcessQueueViewModel _viewModel => DataContext as ProcessQueueViewModel;
 
 		public ProcessQueueControl()
@@ -76,14 +76,14 @@ namespace LibationAvalonia.Views
 					},
 				};
 
-				vm.Items.Enqueue(testList);
-				vm.Items.MoveNext();
-				vm.Items.MoveNext();
-				vm.Items.MoveNext();
-				vm.Items.MoveNext();
-				vm.Items.MoveNext();
-				vm.Items.MoveNext();
-				vm.Items.MoveNext();
+				vm.Queue.Enqueue(testList);
+				vm.Queue.MoveNext();
+				vm.Queue.MoveNext();
+				vm.Queue.MoveNext();
+				vm.Queue.MoveNext();
+				vm.Queue.MoveNext();
+				vm.Queue.MoveNext();
+				vm.Queue.MoveNext();
 				return;
 			}
 			#endregion

Source/LibationAvalonia/Views/ProductsDisplay.axaml

@@ -61,9 +61,13 @@
 				<controls:DataGridTemplateColumnExt CanUserSort="True" Width="75" Header="Liberate" SortMemberPath="Liberate" ClipboardContentBinding="{Binding Liberate.ToolTip}">
 					<DataGridTemplateColumn.CellTemplate>
 						<DataTemplate>
-							<Button Opacity="{Binding Opacity}" Padding="0" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Click="LiberateButton_Click" ToolTip.Tip="{Binding Liberate.ToolTip}">
-								<Image Source="{Binding Liberate.Image}" Stretch="None" />
-							</Button>
+							<Panel ToolTip.Tip="{Binding Liberate.ToolTip}">
+								<Button Opacity="{Binding Opacity}" Padding="0" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Click="LiberateButton_Click" IsVisible="{Binding !Liberate.IsUnavailable}">
+									<Image Source="{Binding Liberate.Image}" Stretch="None" />
+								</Button>
+								<Image Source="{Binding Liberate.Image}" Stretch="None" IsVisible="{Binding Liberate.IsUnavailable}"/>
+								<Panel Background="{StaticResource DisabledGrayBrush}" IsVisible="{Binding Liberate.IsUnavailable}" />
+							</Panel>
 						</DataTemplate>
 					</DataGridTemplateColumn.CellTemplate>
 				</controls:DataGridTemplateColumnExt>
@@ -183,6 +187,16 @@
 						</DataTemplate>
 					</DataGridTemplateColumn.CellTemplate>
 				</controls:DataGridTemplateColumnExt>
+				
+				<controls:DataGridTemplateColumnExt Width="102" Header="Last&#xA;Download" CanUserSort="True" SortMemberPath="LastDownload" ClipboardContentBinding="{Binding LastDownload}">
+					<DataGridTemplateColumn.CellTemplate>
+						<DataTemplate>
+							<Panel Background="{Binding BackgroundBrush}" ToolTip.Tip="{Binding LastDownload.ToolTipText}" DoubleTapped="Version_DoubleClick">
+								<TextBlock Text="{Binding LastDownload}" TextWrapping="WrapWithOverflow" FontSize="10" />
+							</Panel>
+						</DataTemplate>
+					</DataGridTemplateColumn.CellTemplate>
+				</controls:DataGridTemplateColumnExt>
 
 				<controls:DataGridTemplateColumnExt CanUserSort="True" Width="100" Header="Tags" SortMemberPath="BookTags" ClipboardContentBinding="{Binding BookTags.Tags}">
 					<DataGridTemplateColumn.CellTemplate>

Source/LibationAvalonia/Views/ProductsDisplay.axaml.cs

@@ -19,6 +19,7 @@ namespace LibationAvalonia.Views
 	public partial class ProductsDisplay : UserControl
 	{
 		public event EventHandler<LibraryBook> LiberateClicked;
+		public event EventHandler<LibraryBook> ConvertToMp3Clicked;
 
 		private ProductsDisplayViewModel _viewModel => DataContext as ProductsDisplayViewModel;
 		ImageDisplayDialog imageDisplayDialog;
@@ -30,20 +31,25 @@ namespace LibationAvalonia.Views
 			if (Design.IsDesignMode)
 			{
 				using var context = DbContexts.GetContext();
-				List<LibraryBook> sampleEntries = new()
+				List<LibraryBook> sampleEntries;
+				try
 				{
-					//context.GetLibraryBook_Flat_NoTracking("B00DCD0OXU"),
-					context.GetLibraryBook_Flat_NoTracking("B017V4IM1G"),
-					context.GetLibraryBook_Flat_NoTracking("B017V4IWVG"),
-					context.GetLibraryBook_Flat_NoTracking("B017V4JA2Q"),
-					context.GetLibraryBook_Flat_NoTracking("B017V4NUPO"),
-					context.GetLibraryBook_Flat_NoTracking("B017V4NMX4"),
-					context.GetLibraryBook_Flat_NoTracking("B017V4NOZ0"),
-					context.GetLibraryBook_Flat_NoTracking("B017WJ5ZK6")
-				};
+					sampleEntries = new()
+					{
+						//context.GetLibraryBook_Flat_NoTracking("B00DCD0OXU"),try{
+						context.GetLibraryBook_Flat_NoTracking("B017WJ5ZK6"),
+						context.GetLibraryBook_Flat_NoTracking("B017V4IWVG"),
+						context.GetLibraryBook_Flat_NoTracking("B017V4JA2Q"),
+						context.GetLibraryBook_Flat_NoTracking("B017V4NUPO"),
+						context.GetLibraryBook_Flat_NoTracking("B017V4NMX4"),
+						context.GetLibraryBook_Flat_NoTracking("B017V4NOZ0"),
+						context.GetLibraryBook_Flat_NoTracking("B017WJ5ZK6")
+					};
+				}
+				catch { sampleEntries = new(); }
 
 				var pdvm = new ProductsDisplayViewModel();
-				_ = pdvm.DisplayBooksAsync(sampleEntries);
+				pdvm.BindToGrid(sampleEntries);
 				DataContext = pdvm;
 
 				return;
@@ -83,7 +89,7 @@ namespace LibationAvalonia.Views
 			{
 				var entry = args.GridEntry;
 
-                if (entry.IsSeries)
+                if (entry.Liberate.IsSeries)
 					return;
 
                 var setDownloadMenuItem = new MenuItem()
@@ -101,7 +107,7 @@ namespace LibationAvalonia.Views
                 setNotDownloadMenuItem.Click += (_, __) => entry.Book.UpdateBookStatus(LiberatedStatus.NotLiberated);
 
                 var removeMenuItem = new MenuItem() { Header = "_Remove from library" };
-				removeMenuItem.Click += async (_, __) => await Task.Run(() => LibraryCommands.RemoveBook(entry.AudibleProductId));
+				removeMenuItem.Click += async (_, __) => await Task.Run(entry.LibraryBook.RemoveBook);
 
 				var locateFileMenuItem = new MenuItem() { Header = "_Locate file..." };
                 locateFileMenuItem.Click += async (_, __) =>
@@ -131,6 +137,12 @@ namespace LibationAvalonia.Views
                         await MessageBox.ShowAdminAlert(null, msg, msg, ex);
                     }
                 };
+				var convertToMp3MenuItem = new MenuItem
+				{
+					Header = "_Convert to Mp3",
+					IsEnabled = entry.Book.UserDefinedItem.BookStatus is LiberatedStatus.Liberated 
+				};
+				convertToMp3MenuItem.Click += (_, _) => ConvertToMp3Clicked?.Invoke(this, entry.LibraryBook);
 
 				var bookRecordMenuItem = new MenuItem { Header = "View _Bookmarks/Clips" };
 				bookRecordMenuItem.Click += async (_, _) => await new BookRecordsDialog(entry.LibraryBook).ShowDialog(VisualRoot as Window);
@@ -141,6 +153,7 @@ namespace LibationAvalonia.Views
 					setNotDownloadMenuItem,
 					removeMenuItem,
 					locateFileMenuItem,
+					convertToMp3MenuItem,
 					new Separator(),
 					bookRecordMenuItem
 				});
@@ -298,6 +311,12 @@ namespace LibationAvalonia.Views
 				imageDisplayDialog.Close();
 		}
 
+		public void Version_DoubleClick(object sender, Avalonia.Input.TappedEventArgs args)
+		{
+			if (sender is Control panel && panel.DataContext is LibraryBookEntry lbe && lbe.LastDownload.IsValid)
+				lbe.LastDownload.OpenReleaseUrl();
+		}
+
 		public void Cover_Click(object sender, Avalonia.Input.TappedEventArgs args)
 		{
 			if (sender is not Image tblock || tblock.DataContext is not GridEntry gEntry)
@@ -313,7 +332,7 @@ namespace LibationAvalonia.Views
 			void PictureCached(object sender, PictureCachedEventArgs e)
 			{
 				if (e.Definition.PictureId == picDef.PictureId)
-					imageDisplayDialog.CoverBytes = e.Picture;
+					imageDisplayDialog.SetCoverBytes(e.Picture);
 
 				PictureStorage.PictureCached -= PictureCached;
 			}
@@ -328,7 +347,7 @@ namespace LibationAvalonia.Views
 			imageDisplayDialog.BookSaveDirectory = AudibleFileStorage.Audio.GetDestinationDirectory(gEntry.LibraryBook);
 			imageDisplayDialog.PictureFileName = System.IO.Path.GetFileName(AudibleFileStorage.Audio.GetBooksDirectoryFilename(gEntry.LibraryBook, ".jpg"));
 			imageDisplayDialog.Title = windowTitle;
-			imageDisplayDialog.CoverBytes = initialImageBts;
+			imageDisplayDialog.SetCoverBytes(initialImageBts);
 
 			if (!isDefault)
 				PictureStorage.PictureCached -= PictureCached;

Source/LibationCli/LibationCli.csproj

@@ -11,13 +11,7 @@
 	</PropertyGroup>
 
 	<PropertyGroup>
-		<!--
-    HACK FOR COMPILER BUG  2021-09-14. Hopefully will be fixed in future versions
-    - Not using SatelliteResourceLanguages will load all language packs: works
-    - Specifying 'en' semicolon 1 more should load 1 language pack: works
-    - Specifying only 'en' should load no language packs: broken, still loads all
-    -->
-		<SatelliteResourceLanguages>en;es</SatelliteResourceLanguages>
+		<SatelliteResourceLanguages>en</SatelliteResourceLanguages>
 	</PropertyGroup>
 
 	<!--

Source/LibationFileManager/Configuration.Environment.cs

@@ -20,6 +20,8 @@ namespace LibationFileManager
 		public static bool IsWindows { get; } = OperatingSystem.IsWindows();
         public static bool IsLinux { get; } = OperatingSystem.IsLinux();
         public static bool IsMacOs { get; } = OperatingSystem.IsMacOS();
+		public static Version LibationVersion { get; private set; }
+		public static void SetLibationVersion(Version version) => LibationVersion = version;
 
 		public static OS OS { get; }
 			= IsLinux ? OS.Linux

Source/LibationFileManager/Configuration.PersistentSettings.cs

@@ -73,7 +73,7 @@ namespace LibationFileManager
 
 		public bool Exists(string propertyName) => persistentDictionary.Exists(propertyName);
 
-		[Description("Set cover art as the folder's icon. (Windows only)")]
+		[Description("Set cover art as the folder's icon. (Windows and macOS only)")]
 		public bool UseCoverAsFolderIcon { get => GetNonString(defaultValue: false); set => SetNonString(value); }
 
 		[Description("Use the beta version of Libation\r\nNew and experimental features, but probably buggy.\r\n(requires restart to take effect)")]
@@ -121,6 +121,12 @@ namespace LibationFileManager
 		[Description("Lame encoder target. true = Bitrate, false = Quality")]
 		public bool LameTargetBitrate { get => GetNonString(defaultValue: false); set => SetNonString(value); }
 
+		[Description("Maximum audio sample rate")]
+		public AAXClean.SampleRate MaxSampleRate { get => GetNonString(defaultValue: AAXClean.SampleRate.Hz_44100); set => SetNonString(value); }
+
+		[Description("Lame encoder quality")]
+		public NAudio.Lame.EncoderQuality LameEncoderQuality { get => GetNonString(defaultValue: NAudio.Lame.EncoderQuality.High); set => SetNonString(value); }
+
 		[Description("Lame encoder downsamples to mono")]
 		public bool LameDownsampleMono {  get => GetNonString(defaultValue: true); set => SetNonString(value); }
 

Source/LibationFileManager/IInteropFunctions.cs

@@ -8,7 +8,7 @@ namespace LibationFileManager
         void SetFolderIcon(string image, string directory);
         void DeleteFolderIcon(string directory);
         Process RunAsRoot(string exe, string args);
-        void InstallUpdate(string updateBundle);
-        bool CanUpdate { get; }
+        void InstallUpgrade(string upgradeBundle);
+        bool CanUpgrade { get; }
     }
 }

Source/LibationFileManager/NullInteropFunctions.cs

@@ -11,8 +11,8 @@ namespace LibationFileManager
 
         public void SetFolderIcon(string image, string directory) => throw new PlatformNotSupportedException();
         public void DeleteFolderIcon(string directory) => throw new PlatformNotSupportedException();
-		public bool CanUpdate => throw new PlatformNotSupportedException();
+		public bool CanUpgrade => throw new PlatformNotSupportedException();
 		public Process RunAsRoot(string exe, string args) => throw new PlatformNotSupportedException();
-		public void InstallUpdate(string updateBundle) => throw new PlatformNotSupportedException();
+		public void InstallUpgrade(string updateBundle) => throw new PlatformNotSupportedException();
 	}
 }

Source/LibationFileManager/WindowsDirectory.cs

@@ -9,11 +9,13 @@ namespace LibationFileManager
 {
     public static class WindowsDirectory
     {
+
         public static void SetCoverAsFolderIcon(string pictureId, string directory)
         {
             try
             {
-                if (!Configuration.Instance.UseCoverAsFolderIcon || !Configuration.IsWindows)
+                //Currently only works for Windows and macOS
+                if (!Configuration.Instance.UseCoverAsFolderIcon || Configuration.IsLinux)
                     return;
 
                 // get path of cover art in Images dir. Download first if not exists

Source/LibationUiBase/IcoEncoder.cs

@@ -0,0 +1,52 @@
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp;
+using System;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using SixLabors.ImageSharp.Formats;
+
+namespace LibationUiBase
+{
+	public class IcoEncoder : IImageEncoder
+	{
+		public bool SkipMetadata { get; init; } = true;
+
+		public void Encode<TPixel>(Image<TPixel> image, Stream stream) where TPixel : unmanaged, IPixel<TPixel>
+		{
+			// https://stackoverflow.com/a/21389253
+
+			using var ms = new MemoryStream();
+			//Knowing the image size ahead of time removes the
+			//requirement of the output stream to support seeking.
+			image.SaveAsPng(ms);
+
+			//Disposing of the BinaryWriter disposes the soutput stream. Let the caller clean up.
+			var bw = new BinaryWriter(stream);
+
+			// Header
+			bw.Write((short)0);   // 0-1 : reserved
+			bw.Write((short)1);   // 2-3 : 1=ico, 2=cur
+			bw.Write((short)1);   // 4-5 : number of images
+
+			// Image directory
+			var w = image.Width;
+			if (w >= 256) w = 0;
+			bw.Write((byte)w);                      // 0 : width of image
+			var h = image.Height;
+			if (h >= 256) h = 0;
+			bw.Write((byte)h);                      // 1 : height of image
+			bw.Write((byte)0);                      // 2 : number of colors in palette
+			bw.Write((byte)0);                      // 3 : reserved
+			bw.Write((short)0);                     // 4 : number of color planes
+			bw.Write((short)0);                     // 6 : bits per pixel
+			bw.Write((int)ms.Position);             // 8 : image size
+			bw.Write((int)stream.Position + 4);     // 12: offset of image data
+			ms.Position = 0;
+			ms.CopyTo(stream);                      // Image data
+		}
+
+		public Task EncodeAsync<TPixel>(Image<TPixel> image, Stream stream, CancellationToken cancellationToken) where TPixel : unmanaged, IPixel<TPixel>
+			=> throw new NotImplementedException();
+	}
+}

Source/LibationUiBase/LastDownloadStatus.cs

@@ -0,0 +1,41 @@
+using DataLayer;
+using System;
+
+namespace LibationUiBase
+{
+	public class LastDownloadStatus : IComparable
+	{
+		public bool IsValid => LastDownloadedVersion is not null && LastDownloaded.HasValue;
+		public Version LastDownloadedVersion { get; }
+		public DateTime? LastDownloaded { get; }
+		public string ToolTipText => IsValid ? $"Double click to open v{LastDownloadedVersion.ToString(3)} release notes" : "";
+
+		public LastDownloadStatus() { }
+		public LastDownloadStatus(UserDefinedItem udi)
+		{
+			LastDownloadedVersion = udi.LastDownloadedVersion;
+			LastDownloaded = udi.LastDownloaded;
+		}
+
+		public void OpenReleaseUrl()
+		{
+			if (IsValid)
+				Dinah.Core.Go.To.Url($"{AppScaffolding.LibationScaffolding.RepositoryUrl}/releases/tag/v{LastDownloadedVersion.ToString(3)}");
+		}
+
+		public override string ToString()
+			=> IsValid ? $"{dateString()}\n\nLibation v{LastDownloadedVersion.ToString(3)}" : "";
+
+		//Call ToShortDateString to use current culture's date format.
+		private string dateString() => $"{LastDownloaded.Value.ToShortDateString()} {LastDownloaded.Value:HH:mm}";
+
+		public int CompareTo(object obj)
+		{
+			if (obj is not LastDownloadStatus second) return -1;
+			else if (IsValid && !second.IsValid) return -1;
+			else if (!IsValid && second.IsValid) return 1;
+			else if (!IsValid && !second.IsValid) return 0;
+			else return LastDownloaded.Value.CompareTo(second.LastDownloaded.Value);
+		}
+	}
+}

Source/LibationUiBase/LibationUiBase.csproj

@@ -8,6 +8,10 @@
 	  <AppendRuntimeIdentifierToOutputPath>false</AppendRuntimeIdentifierToOutputPath>
   </PropertyGroup>
 
+  <ItemGroup>
+	<PackageReference Include="SixLabors.ImageSharp" Version="3.0.0" />
+  </ItemGroup>
+
   <ItemGroup>
 	<ProjectReference Include="..\ApplicationServices\ApplicationServices.csproj" />
 	<ProjectReference Include="..\AppScaffolding\AppScaffolding.csproj" />

Source/LibationUiBase/SampleRateSelection.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace LibationUiBase
+{
+	public class SampleRateSelection
+	{
+		public AAXClean.SampleRate SampleRate { get; }
+		public SampleRateSelection(AAXClean.SampleRate sampleRate)
+		{
+			SampleRate = sampleRate;
+		}
+		public override string ToString() => $"{(int)SampleRate} Hz";
+	}
+}

Source/LibationUiBase/TrackedQueue[T].cs

@@ -1,9 +1,8 @@
 using System;
 using System.Collections.Generic;
-using System.Collections.ObjectModel;
 using System.Linq;
 
-namespace LibationAvalonia.ViewModels
+namespace LibationUiBase
 {
 	public enum QueuePosition
 	{
@@ -33,7 +32,7 @@ namespace LibationAvalonia.ViewModels
 	 * and is stored in ObservableCollection.Items.  When the primary list changes, the
 	 * secondary list is cleared and reset to match the primary. 
 	 */
-	public class TrackedQueue<T> : ObservableCollection<T> where T : class
+	public class TrackedQueue<T> where T : class
 	{
 		public event EventHandler<int> CompletedCountChanged;
 		public event EventHandler<int> QueuededCountChanged;
@@ -47,6 +46,60 @@ namespace LibationAvalonia.ViewModels
 		private readonly List<T> _completed = new();
 		private readonly object lockObject = new();
 
+		private readonly ICollection<T> _underlyingList;
+
+		public TrackedQueue(ICollection<T> underlyingList = null)
+		{
+			_underlyingList = underlyingList;
+		}
+
+		public T this[int index]
+		{
+			get
+			{
+				lock (lockObject)
+				{
+					if (index < _completed.Count)
+						return _completed[index];
+					index -= _completed.Count;
+
+					if (index == 0 && Current != null) return Current;
+
+					if (Current != null) index--;
+
+					if (index < _queued.Count) return _queued.ElementAt(index);
+
+					throw new IndexOutOfRangeException();
+				}
+			}
+		}
+
+		public int Count
+		{
+			get
+			{
+				lock (lockObject)
+				{
+					return _queued.Count + _completed.Count + (Current == null ? 0 : 1);
+				}
+			}
+		}
+
+		public int IndexOf(T item)
+		{
+			lock (lockObject)
+			{
+				if (_completed.Contains(item))
+					return _completed.IndexOf(item);
+
+				if (Current == item) return _completed.Count;
+
+				if (_queued.Contains(item))
+					return _queued.IndexOf(item) + (Current is null ? 0 : 1);
+				return -1;
+			}
+		}
+
 		public bool RemoveQueued(T item)
 		{
 			bool itemsRemoved;
@@ -188,29 +241,6 @@ namespace LibationAvalonia.ViewModels
 			}
 		}
 
-		public bool TryPeek(out T item)
-		{
-			lock (lockObject)
-			{
-				if (_queued.Count == 0)
-				{
-					item = null;
-					return false;
-				}
-				item = _queued[0];
-				return true;
-			}
-		}
-
-		public T Peek()
-		{
-			lock (lockObject)
-			{
-				if (_queued.Count == 0) throw new InvalidOperationException("Queue empty");
-				return _queued.Count > 0 ? _queued[0] : default;
-			}
-		}
-
 		public void Enqueue(IEnumerable<T> item)
 		{
 			int queueCount;
@@ -220,15 +250,15 @@ namespace LibationAvalonia.ViewModels
 				queueCount = _queued.Count;
 			}
 			foreach (var i in item)
-				base.Add(i);
+				_underlyingList?.Add(i);
 			QueuededCountChanged?.Invoke(this, queueCount);
 		}
 
 		private void RebuildSecondary()
 		{
-			base.ClearItems();
+			_underlyingList?.Clear();
 			foreach (var item in GetAllItems())
-				base.Add(item);
+				_underlyingList?.Add(item);
 		}
 
 		public IEnumerable<T> GetAllItems()

Source/LibationUiBase/Upgrader.cs

@@ -0,0 +1,148 @@
+using AppScaffolding;
+using Dinah.Core.Net.Http;
+using LibationFileManager;
+using System;
+using System.IO;
+using System.Net.Http;
+using System.Threading.Tasks;
+
+namespace LibationUiBase
+{
+	public class UpgradeEventArgs
+	{
+		public UpgradeProperties UpgradeProperties { get; internal init; }
+		public bool CapUpgrade { get; internal init; }
+		private bool _ignore = false;
+		private bool _installUpgrade = true;
+		public bool Ignore
+		{
+			get => _ignore;
+			set
+			{
+				_ignore = value;
+				_installUpgrade &= !Ignore;
+			}
+		}
+		public bool InstallUpgrade
+		{
+			get => _installUpgrade;
+			set
+			{
+				_installUpgrade = value;
+				_ignore &= !InstallUpgrade;
+			}
+		}
+	}
+
+	public class Upgrader
+	{
+		public event EventHandler DownloadBegin;
+		public event EventHandler<DownloadProgress> DownloadProgress;
+		public event EventHandler<bool> DownloadCompleted;
+
+		public async Task CheckForUpgradeAsync(Func<UpgradeEventArgs,Task> upgradeAvailableHandler)
+		{
+			try
+			{
+				var upgradeProperties = await Task.Run(LibationScaffolding.GetLatestRelease);
+				if (upgradeProperties is null) return;
+
+				const string ignoreUpgrade = "IgnoreUpgrade";
+				var config = Configuration.Instance;
+
+				if (config.GetString(propertyName: ignoreUpgrade) == upgradeProperties.LatestRelease.ToString())
+					return;
+
+				var interop = InteropFactory.Create();
+
+				if (!interop.CanUpgrade)
+					Serilog.Log.Logger.Information("Can't perform upgrade automatically");
+
+				var upgradeEventArgs = new UpgradeEventArgs
+				{
+					UpgradeProperties = upgradeProperties,
+					CapUpgrade = interop.CanUpgrade
+				};
+
+				await upgradeAvailableHandler(upgradeEventArgs);
+
+				if (upgradeEventArgs.Ignore)
+					config.SetString(upgradeProperties.LatestRelease.ToString(), ignoreUpgrade);
+
+				if (!upgradeEventArgs.InstallUpgrade) return;
+
+				//Download the upgrade file in the background,
+				DownloadBegin?.Invoke(this, EventArgs.Empty);
+				string upgradeBundle = await DownloadUpgradeAsync(upgradeProperties);
+
+				if (string.IsNullOrEmpty(upgradeBundle) || !File.Exists(upgradeBundle))
+				{
+					DownloadCompleted?.Invoke(this, false);
+				}
+				else
+				{
+					DownloadCompleted?.Invoke(this, true);
+
+					//Install the upgrade
+					Serilog.Log.Logger.Information($"Begin running auto-upgrader");
+					interop.InstallUpgrade(upgradeBundle);
+					Serilog.Log.Logger.Information($"Completed running auto-upgrader");
+				}
+			}
+			catch (Exception ex)
+			{
+				Serilog.Log.Logger.Error(ex, "An error occured while checking for app upgrades.");
+			}
+		}
+
+		private async Task<string> DownloadUpgradeAsync(UpgradeProperties upgradeProperties)
+		{
+			if (upgradeProperties.ZipUrl is null)
+			{
+				Serilog.Log.Logger.Warning("Download link for new version not found");
+				return null;
+			}
+
+			//Silently download the upgrade in the background, save it to a temp file.
+
+			var zipFile = Path.Combine(Path.GetTempPath(), Path.GetFileName(upgradeProperties.ZipUrl));
+
+			Serilog.Log.Logger.Information($"Downloading {zipFile}");
+
+			try
+			{
+				using var dlClient = new HttpClient();
+				using var response = await dlClient.GetAsync(upgradeProperties.ZipUrl, HttpCompletionOption.ResponseHeadersRead);
+				using var dlStream = await response.Content.ReadAsStreamAsync();
+				using var tempFile = File.OpenWrite(zipFile);
+
+				int read;
+				long totalRead = 0;
+				Memory<byte> buffer = new byte[128 * 1024];
+				long contentLength = response.Content.Headers.ContentLength ?? 0;
+
+				while ((read = await dlStream.ReadAsync(buffer)) > 0)
+				{
+					await tempFile.WriteAsync(buffer[..read]);
+					totalRead += read;
+
+					DownloadProgress?.Invoke(
+						this,
+						new DownloadProgress
+						{
+							BytesReceived = totalRead,
+							TotalBytesToReceive = contentLength,
+							ProgressPercentage = contentLength > 0 ? 100d * totalRead / contentLength : 0
+						});
+				}
+
+				return zipFile;
+			}
+			catch (Exception ex)
+			{
+				Serilog.Log.Logger.Error(ex, "Failed to download the upgrade: {bundle}", upgradeProperties.ZipUrl);
+				return null;
+			}
+		}
+	}
+}

Source/LibationWinForms/Dialogs/Login/CaptchaDialog.Designer.cs

@@ -28,68 +28,95 @@
 		/// </summary>
 		private void InitializeComponent()
 		{
-			this.captchaPb = new System.Windows.Forms.PictureBox();
-			this.answerTb = new System.Windows.Forms.TextBox();
-			this.submitBtn = new System.Windows.Forms.Button();
-			this.answerLbl = new System.Windows.Forms.Label();
-			((System.ComponentModel.ISupportInitialize)(this.captchaPb)).BeginInit();
-			this.SuspendLayout();
+			captchaPb = new System.Windows.Forms.PictureBox();
+			answerTb = new System.Windows.Forms.TextBox();
+			submitBtn = new System.Windows.Forms.Button();
+			answerLbl = new System.Windows.Forms.Label();
+			label1 = new System.Windows.Forms.Label();
+			passwordTb = new System.Windows.Forms.TextBox();
+			((System.ComponentModel.ISupportInitialize)captchaPb).BeginInit();
+			SuspendLayout();
 			// 
 			// captchaPb
 			// 
-			this.captchaPb.Location = new System.Drawing.Point(12, 12);
-			this.captchaPb.Name = "captchaPb";
-			this.captchaPb.Size = new System.Drawing.Size(200, 70);
-			this.captchaPb.TabIndex = 0;
-			this.captchaPb.TabStop = false;
+			captchaPb.Location = new System.Drawing.Point(13, 14);
+			captchaPb.Margin = new System.Windows.Forms.Padding(4, 3, 4, 3);
+			captchaPb.Name = "captchaPb";
+			captchaPb.Size = new System.Drawing.Size(235, 81);
+			captchaPb.TabIndex = 0;
+			captchaPb.TabStop = false;
 			// 
 			// answerTb
 			// 
-			this.answerTb.Location = new System.Drawing.Point(118, 88);
-			this.answerTb.Name = "answerTb";
-			this.answerTb.Size = new System.Drawing.Size(94, 20);
-			this.answerTb.TabIndex = 1;
+			answerTb.Location = new System.Drawing.Point(136, 130);
+			answerTb.Margin = new System.Windows.Forms.Padding(4, 3, 4, 3);
+			answerTb.Name = "answerTb";
+			answerTb.Size = new System.Drawing.Size(111, 23);
+			answerTb.TabIndex = 2;
 			// 
 			// submitBtn
 			// 
-			this.submitBtn.Location = new System.Drawing.Point(137, 114);
-			this.submitBtn.Name = "submitBtn";
-			this.submitBtn.Size = new System.Drawing.Size(75, 23);
-			this.submitBtn.TabIndex = 2;
-			this.submitBtn.Text = "Submit";
-			this.submitBtn.UseVisualStyleBackColor = true;
-			this.submitBtn.Click += new System.EventHandler(this.submitBtn_Click);
+			submitBtn.Location = new System.Drawing.Point(159, 171);
+			submitBtn.Margin = new System.Windows.Forms.Padding(4, 3, 4, 3);
+			submitBtn.Name = "submitBtn";
+			submitBtn.Size = new System.Drawing.Size(88, 27);
+			submitBtn.TabIndex = 2;
+			submitBtn.Text = "Submit";
+			submitBtn.UseVisualStyleBackColor = true;
+			submitBtn.Click += submitBtn_Click;
 			// 
 			// answerLbl
 			// 
-			this.answerLbl.AutoSize = true;
-			this.answerLbl.Location = new System.Drawing.Point(12, 91);
-			this.answerLbl.Name = "answerLbl";
-			this.answerLbl.Size = new System.Drawing.Size(100, 13);
-			this.answerLbl.TabIndex = 0;
-			this.answerLbl.Text = "CAPTCHA answer: ";
+			answerLbl.AutoSize = true;
+			answerLbl.Location = new System.Drawing.Point(13, 133);
+			answerLbl.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
+			answerLbl.Name = "answerLbl";
+			answerLbl.Size = new System.Drawing.Size(106, 15);
+			answerLbl.TabIndex = 0;
+			answerLbl.Text = "CAPTCHA answer: ";
+			// 
+			// label1
+			// 
+			label1.AutoSize = true;
+			label1.Location = new System.Drawing.Point(13, 104);
+			label1.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
+			label1.Name = "label1";
+			label1.Size = new System.Drawing.Size(60, 15);
+			label1.TabIndex = 0;
+			label1.Text = "Password:";
+			// 
+			// passwordTb
+			// 
+			passwordTb.Location = new System.Drawing.Point(81, 101);
+			passwordTb.Margin = new System.Windows.Forms.Padding(4, 3, 4, 3);
+			passwordTb.Name = "passwordTb";
+			passwordTb.PasswordChar = '*';
+			passwordTb.Size = new System.Drawing.Size(167, 23);
+			passwordTb.TabIndex = 1;
 			// 
 			// CaptchaDialog
 			// 
-			this.AcceptButton = this.submitBtn;
-			this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
-			this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
-			this.ClientSize = new System.Drawing.Size(224, 149);
-			this.Controls.Add(this.answerLbl);
-			this.Controls.Add(this.submitBtn);
-			this.Controls.Add(this.answerTb);
-			this.Controls.Add(this.captchaPb);
-			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
-			this.MaximizeBox = false;
-			this.MinimizeBox = false;
-			this.Name = "CaptchaDialog";
-			this.ShowIcon = false;
-			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
-			this.Text = "CAPTCHA";
-			((System.ComponentModel.ISupportInitialize)(this.captchaPb)).EndInit();
-			this.ResumeLayout(false);
-			this.PerformLayout();
-
+			AcceptButton = submitBtn;
+			AutoScaleDimensions = new System.Drawing.SizeF(7F, 15F);
+			AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+			ClientSize = new System.Drawing.Size(261, 210);
+			Controls.Add(passwordTb);
+			Controls.Add(label1);
+			Controls.Add(answerLbl);
+			Controls.Add(submitBtn);
+			Controls.Add(answerTb);
+			Controls.Add(captchaPb);
+			FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
+			Margin = new System.Windows.Forms.Padding(4, 3, 4, 3);
+			MaximizeBox = false;
+			MinimizeBox = false;
+			Name = "CaptchaDialog";
+			ShowIcon = false;
+			StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
+			Text = "CAPTCHA";
+			((System.ComponentModel.ISupportInitialize)captchaPb).EndInit();
+			ResumeLayout(false);
+			PerformLayout();
 		}
 
 		#endregion
@@ -98,5 +125,7 @@
 		private System.Windows.Forms.TextBox answerTb;
 		private System.Windows.Forms.Button submitBtn;
 		private System.Windows.Forms.Label answerLbl;
+		private System.Windows.Forms.Label label1;
+		private System.Windows.Forms.TextBox passwordTb;
 	}
 }

Source/LibationWinForms/Dialogs/Login/CaptchaDialog.cs

@@ -9,23 +9,35 @@ namespace LibationWinForms.Dialogs.Login
 	public partial class CaptchaDialog : Form
 	{
 		public string Answer { get; private set; }
+		public string Password { get; private set; }
 
 		private MemoryStream ms { get; }
 		private Image image { get; }
 
-		public CaptchaDialog(byte[] captchaImage)
+		public CaptchaDialog() => InitializeComponent();
+		public CaptchaDialog(string password, byte[] captchaImage) : this()
 		{
-			InitializeComponent();
 			this.FormClosed += (_, __) => { ms?.Dispose(); image?.Dispose(); };
 
 			ms = new MemoryStream(captchaImage);
 			image = Image.FromStream(ms);
 			this.captchaPb.Image = image;
+
+			passwordTb.Text = password;
+
+			(string.IsNullOrEmpty(password) ? passwordTb : answerTb).Select();
 		}
 
 		private void submitBtn_Click(object sender, EventArgs e)
 		{
-			Answer = this.answerTb.Text;
+			if (string.IsNullOrWhiteSpace(passwordTb.Text))
+			{
+				MessageBox.Show(this, "Please re-enter your password");
+				return;
+			}
+
+			Answer = answerTb.Text;
+			Password = passwordTb.Text;
 
 			Serilog.Log.Logger.Information("Submit button clicked: {@DebugInfo}", new { Answer });