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.