Gregory Dale Bear (born August 20, 1951) is an American science fiction and mainstream author. His work has covered themes of galactic conflict (Forge of God books), artificial universes (The Way series), consciousness and cultural practises (Queen of Angels), and accelerated evolution (Blood Music, Darwin's Radio, and Darwin's Children). His most recent work is the Forerunner Trilogy, written in the Halo universe. Greg Bear has written 44 books in total over the years since he started writing.