Dan Simmons (born April 4, 1948) is an American science fiction and horror writer and author of the Hugo Award-winning science fiction series, the Hyperion Cantos, and the Locus-winning Ilium/Olympos cycle.His work spans the science fiction, horror and fantasy genres, sometimes within a single novel: a typical example of Simmons' intermingling of genres is Song of Kali (1985), winner of World Fantasy Award.