"The Strange Case of Dr Jekyll and Mr Hyde" is a novella written by Robert Louis Stevenson in 1886. It explores the duality of human nature through the character of Dr. Jekyll, a respected scientist who creates a potion that transforms him into Mr. Hyde, his evil alter ego. This transformation allows Jekyll to indulge in immoral behavior without facing the consequences of his actions. The story is set in Victorian London and delves into themes of identity, morality, and the struggle between good and evil. As Hyde's actions become increasingly violent, Jekyll grapples with the consequences of his experiments, leading to a tragic conclusion that highlights the dangers of unchecked ambition and the complexity of the human psyche.