| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Reappraisal of Yoga: Essays in Indian Philosophy | 978-0-09-106410-5 (0-09-106410-4) | 1971 | Georg Feuerstein |
| The Essence of Yoga: Essays on the Development of Yogic Philosophy from the Vedas to Modern Times | 978-0-89281-738-2 (0-89281-738-0) | 1997 | Georg Feuerstein Ph.D. |