The Strange Case of Dr Jekyll and Mr Hyde is the original novella written by the Scottish author Robert Louis Stevenson that was first published in 1886. An intriguing combination of fantastic thriller and moral allegory, The Strange Case of Dr. Jekyll and Mr. Hyde depicts the gripping struggle of two opposing personalities - one essentially good, the other evil - for the soul of one man. Its tingling suspense and intelligent and sensitive portrayal of man's dual nature reveals Stevenson as a writer of great skill and originality, whose power to terrify and move us remains, over a century later, undiminished.The novella's impact is such that it has become a part of the language, with the very phrase "Jekyll and Hyde" coming to mean a person who is vastly different in moral character from one situation to the next.