The Strange Case of Dr. Jekyll and Mr. Hyde is a novella by Robert Louis Stevenson that explores the duality of human nature and the dark side of Victorian society. The story follows Dr. Jekyll, a respected scientist who creates a potion that transforms him into the evil Mr. Hyde. As Dr. Jekyll struggles to control his alter ego, the novella delves into themes of morality, repression, and the consequences of indulging one's desires. Stevenson's gripping narrative and suspenseful storytelling make this novella a captivating exploration of the decadence and fin-de-siècle period.