A Connecticut Yankee in King Arthur's Court is an 1889 novel by American humorist and writer Mark Twain. The work is a very early example of time travel in literature, anticipating by six years H. G. Wells' The Time Machine of 1895 (however, unlike Wells, Twain does not give any real explanation of his protagonist's traveling in time). Some early editions are entitled A Yankee at the Court of King Arthur. (Summary by Wikipedia)