The Sign of Four is the second novel featuring Sherlock Holmes, written by Sir Arthur Conan Doyle and published in 1890. Following the success of A Study in Scarlet, this installment presents a complex mystery involving Mary Morstan, who seeks Holmes’s help to uncover the fate of her missing father and the mystery behind a series of pearls she receives annually. The narrative explores themes of imperialism and greed against the backdrop of British-occupied India. As Holmes and Dr. Watson delve into the case, they learn about Major Sholto's hidden treasure and the nefarious circumstances surrounding it, including a murder and a series of mysterious threats. The investigation leads them to confront Jonathan Small and his accomplice, who are linked to a past of revenge and treasure theft. While unraveling the intricate plot, Watson finds love with Mary, culminating in a proposal amidst the chaos. Ultimately, Holmes's addiction resurfaces as he awaits the next stimulating challenge, reflecting his complex character and the novel's deeper themes.
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