Years have passed since he tangled with Irene Adler and Professor Moriarty, since he solved the mysteries of the Red-Headed League and the Hound of the Baskervilles, but even in retirement Sherlock Holmes remains as sharp witted and inimitable as ever. Good thing, because England needs him and his loyal friend Dr. Watson now more than ever. On the eve of World War I, German agents have infiltrated the British military; crucial state secrets are within their grasp. Only Holmes and Watson can foil the Kaiser’s spies and rescue the nation from a fate too awful to imagine. In addition to the title story—one of literature’s most thrilling swan songs—this collection includes “The Adventure of Wisteria Lodge,” “The Adventure of the Cardboard Box,” “The Adventure of the Devil’s Foot,” and four other captivating mysteries showcasing Arthur Conan Doyle and his most famous creation at the height of their impressive powers. This ebook features a new introduction by Otto Penzler and has been professionally proofread to ensure accuracy and readability on all devices.