| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Migraines Be Gone: 7 Simple Steps to Eliminating Your Migraines Forever | 978-0-9777493-0-0 (0-9777493-0-4) | 2006 |
| The Stress Mess: How to Thrive in Turbulent Times | 978-0-9777493-1-7 (0-9777493-1-2) | 2009 |
K.k. · Klaus Kämpgen · Klaus Kamphausen · Klaus Kamps · Klaus Knappik · Klaus Kompaß