| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| Ayahuasca: The Visionary and Healing Powers of the Vine of the Soul | 978-0-89281-131-1 (0-89281-131-5) | 2003 |
| Masters of the Living Energy: The Mystical World of the Q'ero of Peru | 978-1-59477-012-8 (1-59477-012-3) | 2004 |