The Sign of Four brings readers back to the world of Sherlock Holmes and his loyal friend, Dr. John Watson. In this intriguing story, Holmes and Watson are enlisted by Mary Morstan to unravel the mystery of her missing father and the unusual gifts she has been receiving. Their investigation reveals a secret pact, a hidden treasure, and a web of deceit that takes them from the busy streets of London to the murky waters of the Thames.
Arthur Conan Doyle skillfully combines elements of mystery ...