| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Player's Option: Skills & Powers | 978-0-7869-0149-4 (0-7869-0149-7) | 1995 | Dale Donovan |
| The Doomsday Drop | 978-0-88038-480-3 (0-88038-480-8) | 1988 | Tracy Hickman |
| Top Secret/S.I. | 978-0-88038-407-0 (0-88038-407-7) | 1991 | |