Arthur Conan Doyle was a British writer best known for his detective fiction featuring the character Sherlock Holmes. His works also include fantasy and science fiction, as well as plays, romances, non-fiction and historical novels. "The Sign of the Four" is the second novel featuring Sherlock Holmes. The novel has a complex plot involving service in India, the Indian Rebellion of 1857, a stolen treasure, and a secret pact among four convicts.