Doyle's first published story involving the legendary Sherlock Holmes, arguably the world's best-known detective, and the first narrative by Holmes's Boswell, the unassuming Dr. Watson, a military surgeon lately returned from the Afghan War. Watson needs a flat-mate and a diversion. Holmes needs a foil. And thus a great literary collaboration begins. Watson and Holmes move to a now-famous address, 221B Baker Street, where Watson is introduced to Holmes's...