Geary Gravel is the author of eleven science fiction and fantasy novels, the sf in two series published by Del Rey. The Autumnworld Mosaic comprises The Alchemists (1984; Philip K. Dick finalist) and The Pathfinders (1988). A Key for the Nonesuch (1990) and Return of the Breakneck Boys (1991) comprise books I and II of The Fading Worlds. His lone piece of short fiction appears in Tales of the Witch World (Norton, ed.).

Gravel's more recent work has been in novelizations: Hook (Fawcett, 1991); three adaptations from Batman: The Animated Series, Shadows of the Past (Bantam, 1993), Dual to the Death (Bantam Spectra, 1994), and The Dragon and the Bat (Boxtree, 1994), as well as Mask of the Phantasm (Bantam, 1994), based on Batman: The Animated Movie; and two books for Del Rey suggested by the computer role-playing game Might&Magic, The Dreamwright (1995) and The Shadowsmith (1996).

Gravel lives in western Massachusetts, where he works as Coordinator of Deaf Services and Staff Sign Language Interpreter at Smith College. He has a marvelous dog named Berry.