| title | ISBN-13 (ISBN-10) | year of publica- tion | |
|---|---|---|---|
| Leading from Within: Martial Arts Skills for Dynamic Business and Management | 978-0-89281-794-8 (0-89281-794-1) | 1999 | |
| One in Two - The Caesar Twins | 978-3-931613-15-0 (3-931613-15-1) | 2002 | |
| The Black Belt Manager: Martial Arts Strategies for Power, Creativity, and Control | 978-0-89281-295-0 (0-89281-295-8) | 1989 |