- "Night of the Falling Star" (1971)
- "The Dragon of Arda" (1980)
- "The Time Crystal" (1991)
- "The Crystal Throne" (1994)
- "The Eye of the Storm" (1995)
- "Child of the Light" (1996)
- "The Crystal Gate" (1997)
- "The Crystal Crown" (1998)
Non-Fiction:
- "The Encyclopedia of Science Fiction and Fantasy" (1974, co-edited with George W. Proctor)
- "Fantasy Book Review" (1977–1981, co-edited with George W. Proctor)
- "The Cambridge Guide to Science Fiction" (1993)
- "Science Fiction: The Cambridge Companion" (2005, co-edited with John Clute)