The Strange Case of Dr. Jekyll and Mr. Hyde is a novella written by Robert Louis Stevenson. It tells the story of Dr. Henry Jekyll, a respected scientist who creates a potion that transforms him into the evil Mr. Hyde. The novella explores the duality of human nature and the consequences of suppressing one's dark desires. With its gripping narrative and thought-provoking themes, The Strange Case of Dr. Jekyll and Mr. Hyde remains a timeless classic in the realm of psychological horror.