2nd book of the Sherlock Holmes series
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An analytical detective is consulted by a young woman who has received a strange communication regarding her long-missing father and a mysterious treasure.
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The Sign of the Four, initially titled just The Sign of Four, is the second of Doyle's novels to feature the analytical detective Sherlock Holmes and his faithful companion and chronicler Dr. Watson. The action takes place not long after the events in A Study in Scarlet, the first Holmes novel, and that prior case is referred to frequently at the beginning of this one.
I: The Science of Deduction
II: The Statement of the Case
III: In Quest of a Solution
IV: The Story of the Bald-Headed Man
V: The Tragedy of Pondicherry Lodge
VI: Sherlock Holmes Gives a Demonstration
VII: The Episode of the Barrel
VIII: The Baker Street Irregulars
IX: A Break in the Chain
X: The End of the Islander
XI: The Great Agra Treasure
XII: The Strange Story of Jonathan Small