Conan Doyle knew nothing about this tale, which was invented whole-cloth by a modern writer. The story has two plots. It is 1891. Sherlock Holmes has become deranged by his constant overuse of cocaine, which he injects into himself, seven percent cocaine and ninety-three percent water. Holmes is convinced that Professor Moriarty, his and his brother Mycroft's math teacher when they were children, is the master criminal behind all the crimes in London, and that the professor is trying to kill … more