Sir Arthur Conan Doyle was a British writer and physician,most noted for his fictional stories about the detective Sherlock Holmes,which are generally considered milestone in the field of crime fiction.During his writing career Sir Arthur wrote 21 novels and over 150 short stories.he is also the author of fantasy and science fiction,which includes three novels and two short stories: The Last World (1912),The Poison Belt(1913) and The Land of Mist(1926).