“In 1887, a young Arthur Conan Doyle published ‘A Study in Scarlet,’ thus creating an international icon in the quick-witted sleuth Sherlock Holmes. In this, the first Holmes mystery, the detective introduces himself to Dr. John H. Watson with the puzzling line ‘You have been in Afghanistan, I perceive.’ And so begins Watson’s, and the world’s, fascination with this enigmatic character.” Doyle presents two equally perplexing mysteries for Holmes to solve—one a murder that takes place in the shadowy outskirts of London, in a locked room where the haunting word Rache is written upon the wall, the other a kidnapping set in the American West. Quickly picking up the “scarlet thread of murder running through the colourless skein of life,” Holmes does not fail at finding...