What Was It?
Written by Fitz James O'Brien in the 19th century, "What Was It?" is a pioneering work of scientific horror that transforms the haunted house tale into an investigation of the impossible. When a mysterious invisible creature attacks the narrator in a New York boarding house, he and his friend Dr. Hammond must grapple with a phenomenon that defies rational explanation—a solid, breathing, tangible body that cannot be seen. The story explores the terror of the unknowable and the limits of scientific understanding.