| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1994 | 978-0-9640321-0-1 | Ruth Drayer | Numerology, the Power in Numbers: A Right and Left Brain Approach |
| 2001 | 978-0-9640321-3-2 | Ruth Drayer | Numerology: The Power In Numbers, A Right & Left Brain Approach |
| 2004 | 978-0-9640321-6-3 | Ruth Abrams Drayer | Wayfarers (Nicholas and Helena Roerich: The Spiritual Journey of Two Great Artists and Peacemakers) |