New: Try matching with "Unabridged" removed from title

src/NzbDrone.Core.Test/MediaFiles/TrackImport/Identification/DistanceFixture.cs

@@ -163,6 +163,22 @@ namespace NzbDrone.Core.Test.MediaFiles.BookImport.Identification
             dist.Penalties.Should().BeEquivalentTo(new Dictionary<string, List<double>> { { "string", new List<double> { 0.0 } } });
         }
 
+        [Test]
+        public void test_add_string_multiple_options_multiple_values_match()
+        {
+            var dist = new Distance();
+            dist.AddString("string", new List<string> { "cat", "dog" }, new List<string> { "dog", "mouse" });
+            dist.Penalties.Should().BeEquivalentTo(new Dictionary<string, List<double>> { { "string", new List<double> { 0.0 } } });
+        }
+
+        [Test]
+        public void test_add_string_multiple_options_multiple_values_no_match()
+        {
+            var dist = new Distance();
+            dist.AddString("string", new List<string> { "cat", "dog" }, new List<string> { "y", "z" });
+            dist.Penalties.Should().BeEquivalentTo(new Dictionary<string, List<double>> { { "string", new List<double> { 1.0 } } });
+        }
+
         [Test]
         public void test_distance()
         {

src/NzbDrone.Core/MediaFiles/BookImport/Identification/Distance.cs

@@ -173,6 +173,22 @@ namespace NzbDrone.Core.MediaFiles.BookImport.Identification
             }
         }
 
+        public void AddString(string key, List<string> values, List<string> options)
+        {
+            if (!values.Any() && !options.Any())
+            {
+                Add(key, 0.0);
+            }
+            else if (!values.Any() || !options.Any())
+            {
+                Add(key, 1.0);
+            }
+            else
+            {
+                Add(key, values.Min(v => options.Min(o => StringScore(v, o))));
+            }
+        }
+
         public void AddBool(string key, bool expr)
         {
             Add(key, expr ? 1.0 : 0.0);

src/NzbDrone.Core/MediaFiles/BookImport/Identification/DistanceCalculator.cs

@@ -19,6 +19,8 @@ namespace NzbDrone.Core.MediaFiles.BookImport.Identification
 
         private static readonly RegexReplace StripSeriesRegex = new RegexReplace(@"\([^\)].+?\)$", string.Empty, RegexOptions.Compiled);
 
+        private static readonly RegexReplace CleanTitleCruft = new RegexReplace(@"\((?:unabridged)\)", string.Empty, RegexOptions.IgnoreCase | RegexOptions.Compiled);
+
         public static Distance BookDistance(List<LocalBook> localTracks, Edition edition)
         {
             var dist = new Distance();
@@ -68,8 +70,10 @@ namespace NzbDrone.Core.MediaFiles.BookImport.Identification
                 }
             }
 
-            dist.AddString("book", title, titleOptions);
-            Logger.Trace("book: '{0}' vs '{1}'; {2}", title, titleOptions.ConcatToString("' or '"), dist.NormalizedDistance());
+            var fileTitles = new[] { title, CleanTitleCruft.Replace(title) }.Distinct().ToList();
+
+            dist.AddString("book", fileTitles, titleOptions);
+            Logger.Trace("book: '{0}' vs '{1}'; {2}", fileTitles.ConcatToString("' or '"), titleOptions.ConcatToString("' or '"), dist.NormalizedDistance());
 
             var isbn = localTracks.MostCommon(x => x.FileTrackInfo.Isbn);
             if (isbn.IsNotNullOrWhiteSpace() && edition.Isbn13.IsNotNullOrWhiteSpace())