Fixed: Attempt to fix uncaught exceptions fetching book data

Closes #1465
Closes #1464

src/NzbDrone.Core/Exceptions/EditionNotFoundException.cs

@@ -0,0 +1,27 @@
+using NzbDrone.Common.Exceptions;
+
+namespace NzbDrone.Core.Exceptions
+{
+    public class EditionNotFoundException : NzbDroneException
+    {
+        public string MusicBrainzId { get; set; }
+
+        public EditionNotFoundException(string musicbrainzId)
+            : base(string.Format("Edition with id {0} was not found, it may have been removed from metadata server.", musicbrainzId))
+        {
+            MusicBrainzId = musicbrainzId;
+        }
+
+        public EditionNotFoundException(string musicbrainzId, string message, params object[] args)
+            : base(message, args)
+        {
+            MusicBrainzId = musicbrainzId;
+        }
+
+        public EditionNotFoundException(string musicbrainzId, string message)
+            : base(message)
+        {
+            MusicBrainzId = musicbrainzId;
+        }
+    }
+}