In Conan Doyle's final six stories featuring Sherlock Holmes and Dr. Watson, the duo face some of their most challenging cases yet. In "The Adventure of the Illustrious Client," Holmes puts his own life in danger as he tries to cut short a young girl's infatuation with the notorious wife-murderer Baron Gruner. Why is Mrs. Maberley offered a handsome price for the "Three Gables," provided she leaves at once and takes nothing with her? Even...