The Strange Case of Dr. Jekyll and Mr. Hyde is a novella by Robert Louis Stevenson that delves into the duality of human nature. Set in Victorian London, the story follows Dr. Jekyll, a respected scientist who creates a potion that transforms him into the evil Mr. Hyde. As Jekyll struggles to control his alter ego, the novella explores the dark side of human desires and the consequences of suppressing them. Stevenson's gripping narrative and exploration of the human psyche make this book a timeless classic.