| title | ISBN-13 | year of publication |
|---|---|---|
| A Global Vision: General Principles for a Sustainable Planet | 978-1-886779-47-1 | 2008 |
| Handbook for Humans: A Synthesis of Paths for Personal Growth | 978-1-886779-05-1 | 1998 |
| Nothing, 2nd Edition | 978-1-886779-15-0 | 1999 |
| The Natural Way: An Inquiry Into Happiness | 978-1-886779-17-4 | 1999 |