HarperCollins · verlag moderne industrie
| title | ISBN-13 | year of publication | |
|---|---|---|---|
| Der geniale 10-Minuten-täglich-Leben-verändernde-Pocket-Lifecoach. | 978-3-478-08307-2 | 2002 | |
| Transform Your Life: 10 Steps to Real Results | 978-0-00-710078-1 | 2000 | |
| Transform Your Life | 978-0-00-732642-6 | 2000 | |
| Your Pocket Life-Coach: 10 Minutes a Day to Transform Your Life and Your Work | 978-0-00-713098-6 | 2001 |