Strange Case of Dr Jekyll and Mr Hyde is an 1886 novella written by the Scottish author Robert Louis Stevenson.
It is about a London lawyer, Gabriel John Utterson, who investigates strange occurrences between his old friend, Dr. Henry Jekyll and the misanthropic Mr. Hyde.
[1] While Hyde is portrayed in the novella as an evil-looking man of diminutive height, many adaptations have taken liberties with the character's physical appearance: Hyde is sometimes depicted with bestial or monstrous features, although sometimes he is more dashing and debonair than Jekyll, giving an alternate motivation for Jekyll to transform himself.
There are over 123 film versions, not including stage and radio, as well as a number of parodies and imitations.
[2] Troy Howarth calls Stevenson's novella "the most filmed work of literature in the silent era.