Fixed: Books added to match existing files have correct monitored status

(cherry picked from commit c98b22723aa8bf0bba2ce9f5b9ec74608c354751)

src/NzbDrone.Core/MediaFiles/BookImport/ImportApprovedBooks.cs

@@ -382,6 +382,7 @@ private Book EnsureBookAdded(List<ImportDecision<LocalBook>> decisions)
 
                     try
                     {
+                        book.Monitored = book.Author.Value.Monitored;
                         book.Added = DateTime.UtcNow;
                         _bookService.InsertMany(new List<Book> { book });