J. F. · J-Z · J Zeigler · Jon Zeigler
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| GURPS Blue Planet | 978-1-55634-588-3 | 2003 | William H. Stoddard |
| GURPS Space 4E Softcover *OP | 978-1-55634-797-9 | 2009 | James L Cambias |
| Gurps Space | 978-1-55634-245-5 | 2006 | James L. Cambias |
| GURPS Traveller: Humaniti | 978-1-55634-521-0 | 2003 | Loren Wiseman |
| GURPS Traveller: Nobles | 978-1-55634-432-9 | 2004 | " |
| Transhuman Space Fifth Wave | 978-1-55634-459-6 | 2002 | |