Murray Fletcher Pratt (25 April 1897 – 10 June 1956) was an American writer of science fiction, fantasy and history. He is best known for his works on naval history and on the American Civil War and for fiction written with L. Sprague de Camp. Aside from his historical writings, Pratt is best known for his fantasy collaborations with de Camp, the most famous of which is the humorous Harold Shea series, was eventually published in full. His solo fantasy novels The Well of the Unicorn and The Blue Star are also highly regarded.