The Sign of Four, is the second novel featuring Sherlock Holmes written by Sir Arthur Conan Doyle. Miss Mary Morstan arrives at 221B, Baker Street to request help and Sherlock Holmes and Dr Watson unravel a mystery of hidden treasure and murder.
Arthur Conan Doyle was a Scottish author and physician, best known for his detective stories featuring the character Sherlock Holmes. Born in Edinburgh in 1859, Doyle trained as a doctor before pursuing a career in writing. He published his …
