Jamie Ziegler · Jean Ziegler · John Ziegler · Jon F. Zeigler
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Gurps Traveller Interstellar Wars | 978-1-55634-746-7 | 2006 | Paul Drye · Loren Wiseman |
| GURPS Traveller Rim of Fire: The Solomani Rim Sourcebook | 978-1-55634-436-7 | 2000 | |
| *OP GURPS Space Fourth Edition | 978-1-55634-245-5 | 2006 | |
| TransHuman Space: Fifth Wave | 978-1-55634-459-6 | 2002 | |