The Valley of Fear

In The Valley of Fear, Sir Arthur Conan Doyle creates an intricate mystery in which the protagonist, Sherlock Holmes, must solve a murder that has been committed by a member of the fictional order of Freemasons. The story is set in the early twentieth century and is full of complex codes and symbols that are used by the Freemasons. Holmes must use all of his skills as a detective to unravel the mystery and catch the killer.