- HörbuchSherlock Holmes and the Giant Sumatran RatJoanna Campbell Slan
- HörbuchSherlock Holmes and the Father of LiesJoanna Campbell Slan
- HörbuchSherlock Holmes and the Nefarious SeafarersJoanna Campbell Slan
- HörbuchSherlock Holmes and the Time MachineJoanna Campbell Slan
- HörbuchSerien: The Confidential Files of Dr. John H. WatsonJoanna Campbell Slan