| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Invisible Power: Insight Principles at Work | 978-0-9965305-0-7 (0-9965305-0-9) | 2015 | Dr. Ken Manning · Sandra Krot |
| Invisible Power: Insight Principles at Work: Everyone's Hidden Capacity | 978-0-9965305-1-4 (0-9965305-1-7) | 2015 | Ken Manning · Sandra Krot |