The story is set in 1888. 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 that had not been done in the preceding novel, A Study in Scarlet (1887). It also introduces Doctor Watson's future wife, Mary Morstan.Each RADLEY CLASSIC is a meticulously restored, luxurious and faithful reproduction of a classic book; produced with elegant text layout, clarity of presentation, and stylistic features that make reading a true pleasure. Special attention is given to legible fonts and adequate letter sizing, correct line length for readability, generous margins and triple lead (lavish line separation); plus we do not allow any mistakes/changes to creep into the original author