28 books • 10 series
Sherlock Holmes and the Adventure of the Speckled Band (On the Case with Holmes and Watson)
Sherlock Holmes and the Adventure of the Dancing Men (On the Case with Holmes and Watson)
Sherlock Holmes and the Adventure of the Sussex Vampire (On the Case with Holmes and Watson, #6)
The Adventure of the Dancing Men; The Three Garridebs (Match wits with Sherlock Holmes, #7)