"The Ultimate Crime" is a short story by Isaac Asimov, dealing with a minor aspect of one of the Sherlock Holmes stories of Sir Arthur Conan Doyle. It is the 24th of Asimov's Black Widowers mystery stories, and it appeared in his anthology More Tales of the Black Widowers (Doubleday, 1976), which collects the second dozen stories of the series. It was written specially for that book. It subsequently appeared again in Sherlock Holmes Through Time and Space (Severn House, 1985), an anthology of stories written by different authors and co-edited by Asimov, and Another Round at the Spaceport Bar (Avon 1989). Source: Wikipedia (en)