| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Daydreaming | 978-1-4134-4642-5 (1-4134-4642-6) | 2004 | |
| Inner Paths to Outer Space: Journeys to Alien Worlds through Psychedelics and Other Spiritual Technologies | 978-1-59477-224-5 (1-59477-224-X) | 2008 | Rick Strassman MD · Luis Eduardo Luna · Ede Frecska |