Del Whitby series

• Starbrat (1972)
• Stardrift (1973) (aka Nail Down the Stars)
• Under a Calculating Star (1975)
• A Law for the Stars (1976)
• Frostworld and Dreamfire (1977)
• The Mansions of Space (1983)

Iron Angel series

• Ironbrand (1980)
• Greymantle (1981)
• Kingsbane (1982)
• The Time of the Annihilator (1985)

Kedrigern series

• The Domesticated Wizard (2002) Omnibus (A Voice for Princess and The Questing of Kedrigern) + 6 short stories ISBN: 9781892065773
• A Voice for Princess (1986)
• The Questing of Kedrigern (1987)
• Dudgeon and Dragons (2003) Omnibus (Kedrigern in Wanderland and Kedrigern and the Dragon comme il faut-New) + 8 short stories ISBN:978-1892065919
• Kedrigern in Wanderland (1988)
• Kedrigern and the Charming Couple (1989)
• A Remembrance for Kedrigern (1990)

Novels

• The Blackboard Cavalier (1966)
• The Addison Tradition (1968)
• A Long Communion (1974)
• The Humans of Ziax II (1974)
• The Windows of Forever (1975)
• The Extraterritorial (1977)
• The Drought on Ziax II (1978)
• The Juggler (1996)
• Other Stories (1983) - collection

Short stories

• "No More Pencils, No More Books" (1979)
• "The Last Jerry Fagin Show" (1980)
• "A Hedge Against Alchemy" (1981)
• "Final Version" (1982) in 100 Short Short Fantasy Stories
• "Stoneskin" (1984)
• "Spirits from the Vasty Deep" (1986)
• "Alaska" (1989)
• "Timekeeper" (1990)
• "A Boy and His Wolf: Three Versions of a Fable" (1993) in Xanadu
• "The Persistence of Memory" (1998)