The Sign of the Four (1890), also called The Sign of Four, is the second novel featuring Sherlock Holmes written by Sir Arthur Conan Doyle.
Also contained in: Adventures of Sherlock Holmes Adventures of Sherlock Holmes Annotated Sherlock Holmes. 1/2 Best of Sherlock Holmes Boys' Sherlock Holmes Celebrated Cases of Sherlock Holmes Complete Sherlock Holmes Complete Sherlock Holmes Illustrated Sherlock Holmes Original Illustrated Strand Sherlock Holmes Sherlock Holmes: His Most Famous Mysteries Sherlock Holmes: The Novels The …