Fritz Leiber (1910–1992) was a prolific American writer of science fiction, fantasy, and horror. Known for his versatile imagination and literary sophistication, Leiber played a major role in shaping modern speculative fiction. He created the influential Fafhrd and the Gray Mouser sword-and-sorcery series and wrote across genres with ease. His work often explored themes of psychology, metaphysics, and the uncanny. A multiple Hugo and Nebula Award winner, Leiber left a legacy that bridges pulp energy and philosophical depth.