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A secret pact A mysterious treasure A murder that baffles the policeand only Holmes can solve In The Sign of the Four Sherlock Holmes and Dr Watson face a twisting tale of betrayal hidden riches and revenge that stretches from colonial India to the foggy streets of London When Mary Morstan receives a cryptic invitation and a priceless pearl she turns to Holmes for help What follows is a deadly chase through riverside slums and locked rooms unr...Seguir leyendo