diff --git a/Emby.Naming/AudioBook/AudioBookFileInfo.cs b/Emby.Naming/AudioBook/AudioBookFileInfo.cs
index e5200416ee..862e396677 100644
--- a/Emby.Naming/AudioBook/AudioBookFileInfo.cs
+++ b/Emby.Naming/AudioBook/AudioBookFileInfo.cs
@@ -14,14 +14,12 @@ namespace Emby.Naming.AudioBook
         /// <param name="container">File type.</param>
         /// <param name="partNumber">Number of part this file represents.</param>
         /// <param name="chapterNumber">Number of chapter this file represents.</param>
-        /// <param name="isDirectory">Indication if we are looking at file or directory.</param>
-        public AudioBookFileInfo(string path, string container, int? partNumber = default, int? chapterNumber = default, bool isDirectory = default)
+        public AudioBookFileInfo(string path, string container, int? partNumber = default, int? chapterNumber = default)
         {
             Path = path;
             Container = container;
             PartNumber = partNumber;
             ChapterNumber = chapterNumber;
-            IsDirectory = isDirectory;
         }
 
         /// <summary>
@@ -48,12 +46,6 @@ namespace Emby.Naming.AudioBook
         /// <value>The chapter number.</value>
         public int? ChapterNumber { get; set; }
 
-        /// <summary>
-        /// Gets or sets a value indicating whether this instance is a directory.
-        /// </summary>
-        /// <value>The type.</value>
-        public bool IsDirectory { get; set; }
-
         /// <inheritdoc />
         public int CompareTo(AudioBookFileInfo? other)
         {
diff --git a/Emby.Naming/AudioBook/AudioBookListResolver.cs b/Emby.Naming/AudioBook/AudioBookListResolver.cs
index 179a3bc073..0d190c172e 100644
--- a/Emby.Naming/AudioBook/AudioBookListResolver.cs
+++ b/Emby.Naming/AudioBook/AudioBookListResolver.cs
@@ -22,21 +22,21 @@ namespace Emby.Naming.AudioBook
             var audioBookResolver = new AudioBookResolver(_options);
 
             var audiobookFileInfos = files
-                .Select(i => audioBookResolver.Resolve(i.FullName, i.IsDirectory))
+                .Select(i => audioBookResolver.Resolve(i.FullName))
                 .OfType<AudioBookFileInfo>()
                 .ToList();
 
             // Filter out all extras, otherwise they could cause stacks to not be resolved
             // See the unit test TestStackedWithTrailer
             var metadata = audiobookFileInfos
-                .Select(i => new FileSystemMetadata { FullName = i.Path, IsDirectory = i.IsDirectory });
+                .Select(i => new FileSystemMetadata { FullName = i.Path, IsDirectory = false });
 
             var stackResult = new StackResolver(_options)
-                .ResolveAudioBooks(metadata);
+                .ResolveAudioBooks(audiobookFileInfos);
 
             foreach (var stack in stackResult)
             {
-                var stackFiles = stack.Files.Select(i => audioBookResolver.Resolve(i, stack.IsDirectoryStack)).OfType<AudioBookFileInfo>().ToList();
+                var stackFiles = stack.Files.Select(i => audioBookResolver.Resolve(i)).OfType<AudioBookFileInfo>().ToList();
                 stackFiles.Sort();
                 // TODO nullable discover if name can be empty
                 var info = new AudioBookInfo(stack.Name ?? string.Empty) { Files = stackFiles };
diff --git a/Emby.Naming/AudioBook/AudioBookResolver.cs b/Emby.Naming/AudioBook/AudioBookResolver.cs
index 56442fc4ee..c9e8c76cbc 100644
--- a/Emby.Naming/AudioBook/AudioBookResolver.cs
+++ b/Emby.Naming/AudioBook/AudioBookResolver.cs
@@ -17,19 +17,13 @@ namespace Emby.Naming.AudioBook
             _options = options;
         }
 
-        public AudioBookFileInfo? Resolve(string path, bool isDirectory = false)
+        public AudioBookFileInfo? Resolve(string path)
         {
             if (path.Length == 0)
             {
                 throw new ArgumentException("String can't be empty.", nameof(path));
             }
 
-            // TODO
-            if (isDirectory)
-            {
-                return null;
-            }
-
             var extension = Path.GetExtension(path);
 
             // Check supported extensions
@@ -46,8 +40,7 @@ namespace Emby.Naming.AudioBook
                 path,
                 container,
                 chapterNumber: parsingResult.ChapterNumber,
-                partNumber: parsingResult.PartNumber,
-                isDirectory: isDirectory);
+                partNumber: parsingResult.PartNumber);
         }
     }
 }
diff --git a/Emby.Naming/Video/StackResolver.cs b/Emby.Naming/Video/StackResolver.cs
index f733cd2620..ce3152739b 100644
--- a/Emby.Naming/Video/StackResolver.cs
+++ b/Emby.Naming/Video/StackResolver.cs
@@ -5,6 +5,7 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Text.RegularExpressions;
+using Emby.Naming.AudioBook;
 using Emby.Naming.Common;
 using MediaBrowser.Model.IO;
 
@@ -29,24 +30,16 @@ namespace Emby.Naming.Video
             return Resolve(files.Select(i => new FileSystemMetadata { FullName = i, IsDirectory = false }));
         }
 
-        public IEnumerable<FileStack> ResolveAudioBooks(IEnumerable<FileSystemMetadata> files)
+        public IEnumerable<FileStack> ResolveAudioBooks(IEnumerable<AudioBookFileInfo> files)
         {
-            var groupedDirectoryFiles = files.GroupBy(file =>
-                file.IsDirectory
-                    ? file.FullName
-                    : Path.GetDirectoryName(file.FullName));
+            var groupedDirectoryFiles = files.GroupBy(file => Path.GetDirectoryName(file.Path));
 
             foreach (var directory in groupedDirectoryFiles)
             {
                 var stack = new FileStack { Name = Path.GetFileName(directory.Key), IsDirectoryStack = false };
                 foreach (var file in directory)
                 {
-                    if (file.IsDirectory)
-                    {
-                        continue;
-                    }
-
-                    stack.Files.Add(file.FullName);
+                    stack.Files.Add(file.Path);
                 }
 
                 yield return stack;