| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Sight Unseen: Science, UFO Invisibility and Transgenic Beings | 978-0-7434-1219-3 (0-7434-1219-2) | 2004 | Budd Hopkins |
| Sight Unseen: Science, UFO Invisibility, and Transgenic Beings | 978-0-7434-1218-6 (0-7434-1218-4) | 2003 | " |