| title | media type | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|---|
| Alien Debt | Paperback | 978-0-7088-8255-9 | 2000 | |
| All These Earths | " | 978-0-553-25413-6 | 1985 | |
| All These Earths | " | 978-0-425-03902-1 | 1978 | |
| Arrow from Earth | " | 978-0-380-77232-2 | 1995 | |
| Rebel's Quest | " | 978-0-7088-3578-4 | 2000 | |
| Rebel's Seed | " | 978-0-7088-8260-3 | 2000 | |
| Star Rebel | " | 978-0-7088-8236-8 | 2000 | |
| The Singularity Project | " | 978-0-8125-2130-6 | 1994 | |
| The Singularity Project | Hardcover | 978-0-312-85443-0 | 1993 | |
| Worlds of If, September-October 1973 | Single Issue Magazine | 978-1-4156-7310-2 | 1973 | Robert Wells · Lee Killough · Stephen Tall |
| Young Rissa | Paperback | 978-0-7088-8272-6 | 2000 | |
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