| title | media type | ISBN-13 | year of publica- tion |
|---|---|---|---|
| Eye of Terror | Mass Market Paperback | 978-0-671-78390-7 | 2000 |
| Eye of Terror | Paperback | 978-1-84154-105-1 | 1999 |
| The Forest of Peldain | Mass Market Paperback | 978-0-88677-068-6 | 1985 |
| The Soul of the Robot | Paperback | 978-1-58715-381-5 | 2001 |