The Sign of the Four: A locked-room murder, a missing Indian treasure, and a cryptic message that challenges the greatest analytical mind in London.

When Miss Mary Morstan arrives at Baker Street with a mysterious plea, she brings with her a case that will awaken the world's only unofficial consulting detective from his profound lethargy. The Sign of the Four plunges you straight into a labyrinthine Victorian mystery paved with annual deliveries of lustrous pearls, a missing military officer, and a fabulous lost treasure from India.

As the brilliantly erratic Sherlock Holmes and his steadfast companion Dr. Watson trace clues through Lond...