An American science fiction author, he is best known for the numerous stories that he published in Weird Tales magazine. His short story collections include Portraits in Moonlight (1964), Disclosures in Scarlet (1972), and Smoke of the Snake (1994). During his youth, he was a prolific reader of adventure stories and classics by Jules Verne and H.G. Wells. During his time at the University of Minnesota, he began publishing his own short stories.