| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Berserker | 978-0-553-57731-0 (0-553-57731-X) | 1998 | S. D. Perry · John Wagner |
| Cosmic Test Tube: Extraterrestrial Contact, Theories & Evidence | 978-0-9639161-2-9 (0-9639161-2-2) | 1998 | Randall Fitzgerald |