Alfred Angelo Attanasio is an American fantasy, science fiction, and literary author. His science fiction novel Radix, winner of the French literary award, the Prix Cosmos 2000, was also nominated for the 1981 Nebula Award for Best Novel. Three more novels followed, In Other Worlds, Arc of the Dream, and The Last Legends of Earth; the four books, together, comprising the critically acclaimed Radix Tetrad. His other novels include historical fiction, Arthurian epics, paranormal romance, fantasy, a Paleolithic saga, crime drama (Silent), science fiction, Wiccan adventure, and Young Adult novels. He has published three collections of short fiction: Beastmarks, Twice Dead Things, and Demons Hide Their Faces. He also writes under the name Adam Lee.