| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Friends: The power and potential of the company you keep | 978-0-06-464019-0 (0-06-464019-1) | 1977 |
| Transcendental Sex: A Meditative Approach to Increasing Sensual Pleasure | 978-0-03-021996-2 (0-03-021996-5) | 1978 |