First published in 1890, The Sign of Four is the second Sherlock Holmes novel by Sir Arthur Conan Doyle. A secret pact, a hidden treasure, and a mysterious death draw Holmes and Watson into a case filled with danger, betrayal, and pursuit along the Thames. It is also the story that introduces Watson to Mary Morstan, the woman who will change his life forever.

This complete audiobook brings one of Holmes’s most thrilling adventures to life, combining intrigue, romance, and classic detective brilliance.

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