| title | ISBN-13 | year of publication | |
|---|---|---|---|
| Bestmögliches Denken: Wie man das Optimale aus seinem Leben macht | 978-3-89530-034-9 | 2000 | |
| Optimal Thinking: 100-Day Audio-CD Program for Permanent Results | 978-0-9653823-4-2 | 2005 | |
| Optimal Thinking Emotional Mastery Wallet Cards | 978-0-9653823-0-4 | 2005 | |
| Optimal Thinking: How to Be Your Best Self | 978-0-471-41464-3 | 2002 |
Beust · The World Academy of Personal Development Inc. · Wiley