Dan Simmons

Dan Simmons (born April 4, 1948) is an American science fiction and horror writer. He is the author of the Hyperion Cantos and the Ilium/Olympos cycles, among other works which span 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 the World Fantasy Award. He also writes mysteries and thrillers, some of which feature the continuing character Joe Kurtz.

Source: Dan Simmons on Wikipedia.