Sign of Four

The Sign of Four, is the second novel featuring Sherlock Holmes written by Sir Arthur Conan Doyle. The Sign of the Four has a complex plot involving service in East India Company, India, the Indian Rebellion of 1857, a stolen treasure, and a secret pact among four convicts ("the Four" of the title) and two corrupt prison guards. It presents the detective's drug habit and humanizes him in a way tha...