Sign of the Four
Author: first_name: Sir Arthur Conan
last_name: Doyle
Language: English
Year: 1890

When a young lady approaches Sherlock Holmes looking for help in finding out what happened to her father when he disappeared 10 years earlier, both Holmes and Watson are sent on a mission involving stolen treasure, service in colonial India and a secret pact among four ex-convicts. (Summary by Robin Cotter)