Das Zeichen der Vier Arthur Conan Doyle - Das Zeichen der Vier ist der zweite Sherlock-Holmes-Roman von Sir Arthur Conan Doyle.Sherlock Holmes und Dr. Watson werden von Miss Mary Morstan beauftragt, bei der Suche nach ihrem verschollenen Vater zu helfen. Dieser war Offizier in Indien und verschwand vor zehn Jahren bei seiner Rückkehr nach England.

Sir Arthur Ignatius Conan Doyle, DL (22 May 1859 7 July 1930) was a Scottish author most noted for his stories about the detective Sherlock Holmes, which are generally considered a major innovation in the field of crime fiction, and the adventures of Professor Challenger. He was a prolific writer whose other works include science fiction stories, historical novels, plays and romances, poetry, and non-fiction. Conan was originally a given name, but Doyle used it as part of his surname in his later years.