“The Horla” by Guy de Maupassant is a psychological horror story that delves into the mind of an unnamed narrator who becomes convinced he is being haunted by an invisible entity. Set in the oppressive heat of a French summer, the narrator’s initially peaceful life is disrupted by a series of unsettling events, leading him to believe that a supernatural being, the Horla, is draining his life force and controlling his actions. As his paranoia deepens, he struggles to discern reality from delusion, culminating in a descent into madness. The story explores themes of mental illness, the supernatural, and the fragility of human sanity.