A Collection of novels and short stories: 1. A Study in Scarlet is an 1887 detective novel by British author Arthur Conan Doyle. Written in 1886, the story marks the first appearance of Sherlock Holmes and Dr. Watson, who would become two of the most famous characters in popular fiction. The book's title derives from a speech given by Holmes, an amateur detective, to his friend and chronicler Watson on the nature of his work, in which he describes the story's murder investigation as his "study in scarlet": "There's the scarlet thread of murder running through the colourless skein of life, and our duty is to unravel it, and isolate it, and expose every inch of it. 2. The Adventures of Sherlock Holmes is a collection of twelve short stories by Arthur Conan Doyle, featuring his fictional detective Sherlock Holmes. It was first published on 14 October 1892; the individual stories had been serialised in The Strand Magazine between June 1891 and July 1892. The stories are not in chronological order, and the only characters common to all twelve are Holmes and Dr. Watson. The stories are related in first-person narrative from Watson's point of view. 3. The Sign of the Four (1890) is the second novel featuring Sherlock Holmes written by Sir Arthur Conan Doyle. Doyle wrote four novels and 56 stories starring the fictional detective. 4. The Memoirs of Sherlock Holmes is a collection of Sherlock Holmes stories. 5. The Hound of the Baskervilles is the third of the crime novels written by Sir Arthur Conan Doyle featuring the detective Sherlock Holmes. Originally serialised in The Strand Magazine from August 1901 to April 1902, it is set largely on Dartmoor in Devon in England's West Country and tells the story of an attempted murder inspired by the legend of a fearsome, diabolical hound of supernatural origin. Sherlock Holmes and his companion Dr. Watson investigate the case. This was the first appearance of Holmes since his apparent death in "The Final Problem", and the success of The Hound of the Baskervilles led to the character's eventual revival.