A Study in Scarlet introduced the great scientific detective Sherlock Holmes and Doctor Watson, his friend and chronicler, to the reading public. This novel, a cornerstone in the annals of crime fiction, tells of their first meeting and how they set up in rooms together in Baker Street. It is not long before the charismatic sleuth and his faithful companion are plunged into a dramatic mystery which starts with the discovery of a corpse in a deserted house and the letters RACHE scrawled on the wall in blood. The Sign of the Four, the second Holmes novel, presents the detective...