"Darkness at Noon" is a novel by Arthur Koestler, published in 1940. It explores the psychological and political struggles of a former revolutionary, Rubashov, who is imprisoned during a totalitarian regime. The story delves into themes of betrayal, ideology, and the moral dilemmas faced by individuals in oppressive systems. Set against the backdrop of the Stalinist purges, the narrative examines the conflict between personal beliefs and the demands of the state. As Rubashov confronts his past actions and the consequences of his loyalty to the Communist Party, the novel raises questions about justice, power, and the nature of truth.