Dan Simmons is an American science fiction and horror writer. He is renowned for his works in the Hyperion Cantos and the Ilium/Olympos cycles, which span across science fiction, horror, and fantasy genres, often blending them within a single novel.

Simmons's genre-intermingling novel Song of Kali (1985) won the prestigious World Fantasy Award. Apart from science fiction and horror, he also pens mysteries and thrillers, some featuring the recurring character Joe Kurtz.