Jamie Ziegler · Jean Ziegler · John Ziegler · Jon F. Zeigler
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| GURPS Space Fourth Edition | 978-1-55634-245-5 (1-55634-245-4) | 2006 | |
| Gurps Traveller Interstellar Wars | 978-1-55634-746-7 (1-55634-746-4) | 2006 | Paul Drye · Loren Wiseman |
| THS Fifth Wave | 978-1-55634-459-6 (1-55634-459-7) | 2002 | |