| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Numbers: Their Meaning and Magic | 978-0-09-110921-9 (0-09-110921-3) | 1972 |
| The Magic and Science of Jewels and Stones | 978-0-9615875-9-8 (0-9615875-9-8) | 1989 |
| The Magic and Science of Jewels and Stones | 978-0-9615875-6-7 (0-9615875-6-3) | 1988 |