This document provides background information on Sir Arthur Conan Doyle, Sherlock Holmes, and some of Doyle's Sherlock Holmes novels and short stories. It discusses that Sherlock Holmes was created by Sir Arthur Conan Doyle and is the protagonist of many of his detective novels. It provides details on some of Doyle's most famous novels featuring Sherlock Holmes and his companion Dr. Watson solving mysteries. It also summarizes the plots of two Sherlock Holmes short stories - "Sherlock Holmes and the Duke's Son" and "The Pyramid of Fear."