Two of the most famous cases of Sherlock Holmes, that take place immediately after the introductory ones of "A Study in Scarlet" and "A Scandal in Bohemia". Arthur Conan Doyle presents us with a puzzling case in "The Red-headed League" and a fascinating expansion of Sherlock's methods and motivations in "The League of the Four". Both cases are essential to understand the characters and the development of the universe of Holmes and Watson.
Sir Arthur Ignatius Conan Doyle was a Scottish writer and physician. He created the character Sherlock Holmes in 1887 for A Study in Scarlet, the first of four novels and fifty-six short stories about Holmes and Dr. Watson. The Sherlock Holmes stories are milestones in the field of crime fiction.
Doyle was a prolific writer. In addition to the Holmes stories, his works include fantasy and science fiction stories about Professor Challenger, and humorous stories about the Napoleonic soldier Brigadier Gerard, as well as plays, romances, poetry, non-fiction, and historical novels. One of Doyle's early short stories, "J. Habakuk Jephson's Statement" (1884), helped to popularise the mystery of the brigantine Mary Celeste, found drifting at sea with no crew member aboard.