Book excerpt: Twelve sensational Sherlock Holmes short stories from a bestselling master of the genre. Maverick detective Sherlock Holmes and his faithful chronicler Dr John Watson return in twelve thrilling short stories. The iconic duo find themselves swiftly drawn into a series of puzzling and sinister events: an otherworldly stone whose touch inflicts fatal bleeding; a hellish potion to unlock a person's devilish psyche; a fiendishly clever, almost undetectable method of revenge and many more - including a brand-new Cthulhu Casebooks story.