The Sign of the Four

First distributed in 1890, The Sign of Four is Sir Arthur Conan Doyle's subsequent book featuring unbelievable investigator Sherlock Holmes. The story is unpredictable, including a mystery between four ex-cons from India and a secret fortune. More unpredictable than the primary Holmes epic, The Sign of Four additionally presents the analyst's medication propensity and leaves breadcrumbs for the peruser that lead toward the last goal.