| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Cognitive Psychology and Cognitive Neuroscience: as appears on Wikibooks, a project of Wikipedia | 978-0-9800707-8-1 (0-9800707-8-3) | 2008 | Wikipedia Wikibooks |
| World's Best Logic Puzzles | 978-0-9800707-0-5 (0-9800707-0-8) | 2008 | |