diff --git a/API.Tests/Services/BookServiceTests.cs b/API.Tests/Services/BookServiceTests.cs
index af5805cc5..a80c1ca01 100644
--- a/API.Tests/Services/BookServiceTests.cs
+++ b/API.Tests/Services/BookServiceTests.cs
@@ -1,6 +1,8 @@
 using System.IO;
 using System.IO.Abstractions;
+using API.Entities.Enums;
 using API.Services;
+using API.Services.Tasks.Scanner.Parser;
 using Microsoft.Extensions.Logging;
 using NSubstitute;
 using Xunit;
@@ -122,4 +124,22 @@ public class BookServiceTests
         var comicInfo = _bookService.GetComicInfo(document);
         Assert.Null(comicInfo);
     }
+
+    [Fact]
+    public void SeriesFallBackToMetadataTitle()
+    {
+        var ds = new DirectoryService(Substitute.For<ILogger<DirectoryService>>(), new FileSystem());
+        var pdfParser = new PdfParser(ds);
+
+        var testDirectory = Path.Join(Directory.GetCurrentDirectory(), "../../../Services/Test Data/BookService");
+        var filePath = Path.Join(testDirectory, "Bizet-Variations_Chromatiques_de_concert_Theme_A4.pdf");
+
+        var comicInfo = _bookService.GetComicInfo(filePath);
+        Assert.NotNull(comicInfo);
+
+        var parserInfo = pdfParser.Parse(filePath, testDirectory, ds.GetParentDirectoryName(testDirectory), LibraryType.Book, comicInfo);
+        Assert.NotNull(parserInfo);
+        Assert.Equal(parserInfo.Title, comicInfo.Title);
+        Assert.Equal(parserInfo.Series, comicInfo.Title);
+    }
 }
diff --git a/API.Tests/Services/Test Data/BookService/Bizet-Variations_Chromatiques_de_concert_Theme_A4.pdf b/API.Tests/Services/Test Data/BookService/Bizet-Variations_Chromatiques_de_concert_Theme_A4.pdf
new file mode 100644
index 000000000..9fe4811a7
Binary files /dev/null and b/API.Tests/Services/Test Data/BookService/Bizet-Variations_Chromatiques_de_concert_Theme_A4.pdf differ
diff --git a/API/Entities/Chapter.cs b/API/Entities/Chapter.cs
index fc709961b..3f96472ca 100644
--- a/API/Entities/Chapter.cs
+++ b/API/Entities/Chapter.cs
@@ -178,8 +178,7 @@ public class Chapter : IEntityDate, IHasReadTimeEstimate, IHasCoverImage
             MinNumber = Parser.DefaultChapterNumber;
             MaxNumber = Parser.DefaultChapterNumber;
         }
-        // NOTE: This doesn't work well for all because Pdf usually should use into.Title or even filename
-        Title = (IsSpecial && info.Format == MangaFormat.Epub)
+        Title = (IsSpecial && info.Format is MangaFormat.Epub or MangaFormat.Pdf)
             ? info.Title
             : Parser.RemoveExtensionIfSupported(Range);
 
diff --git a/API/Helpers/Builders/ChapterBuilder.cs b/API/Helpers/Builders/ChapterBuilder.cs
index 348696820..e7c458eeb 100644
--- a/API/Helpers/Builders/ChapterBuilder.cs
+++ b/API/Helpers/Builders/ChapterBuilder.cs
@@ -39,9 +39,9 @@ public class ChapterBuilder : IEntityBuilder<Chapter>
 
         return builder.WithNumber(Parser.RemoveExtensionIfSupported(info.Chapters)!)
             .WithRange(specialTreatment ? info.Filename : info.Chapters)
-            .WithTitle((specialTreatment && info.Format == MangaFormat.Epub)
+            .WithTitle(specialTreatment && info.Format is MangaFormat.Epub or MangaFormat.Pdf
             ? info.Title
-            : specialTitle)
+            : specialTitle ?? string.Empty)
             .WithIsSpecial(specialTreatment);
     }
 
diff --git a/API/Services/Tasks/Scanner/Parser/PdfParser.cs b/API/Services/Tasks/Scanner/Parser/PdfParser.cs
index 3a5debcbd..bc12e2c77 100644
--- a/API/Services/Tasks/Scanner/Parser/PdfParser.cs
+++ b/API/Services/Tasks/Scanner/Parser/PdfParser.cs
@@ -71,6 +71,11 @@ public class PdfParser(IDirectoryService directoryService) : DefaultParser(direc
         // Patch in other information from ComicInfo
         UpdateFromComicInfo(ret);
 
+        if (comicInfo != null && !string.IsNullOrEmpty(comicInfo.Title))
+        {
+            ret.Title = comicInfo.Title.Trim();
+        }
+
         if (ret.Chapters == Parser.DefaultChapter && ret.Volumes == Parser.LooseLeafVolume && type == LibraryType.Book)
         {
             ret.IsSpecial = true;
@@ -79,6 +84,19 @@ public class PdfParser(IDirectoryService directoryService) : DefaultParser(direc
             ParseFromFallbackFolders(filePath, rootPath, type, ref ret);
         }
 
+        if (type == LibraryType.Book && comicInfo != null)
+        {
+            // For books, fall back to the Title for Series.
+            if (!string.IsNullOrEmpty(comicInfo.Series))
+            {
+                ret.Series = comicInfo.Series.Trim();
+            }
+            else if (!string.IsNullOrEmpty(comicInfo.Title))
+            {
+                ret.Series = comicInfo.Title.Trim();
+            }
+        }
+
         if (string.IsNullOrEmpty(ret.Series))
         {
             ret.Series = Parser.CleanTitle(fileName, type is LibraryType.Comic);
diff --git a/UI/Web/src/app/_pipes/time-ago.pipe.ts b/UI/Web/src/app/_pipes/time-ago.pipe.ts
index 5780b18ab..9940d4bb7 100644
--- a/UI/Web/src/app/_pipes/time-ago.pipe.ts
+++ b/UI/Web/src/app/_pipes/time-ago.pipe.ts
@@ -40,7 +40,7 @@ export class TimeAgoPipe implements PipeTransform, OnDestroy {
               private translocoService: TranslocoService) {}
 
 	transform(value: string | Date | null) {
-    if (value === '' || value === null || value === undefined || (value instanceof String && value.split('T')[0] === '0001-01-01'))  {
+    if (value === '' || value === null || value === undefined || (typeof value === 'string' && value.split('T')[0] === '0001-01-01'))  {
       return this.translocoService.translate('time-ago-pipe.never');
     }