Der Energy Bus: Steigen Sie ein und tanken Sie positive Energie für Beruf und Privatleben
2021
The Coffee Bean: A Simple Lesson to Create Positive Change (Unabridged)
2024
How to be a Coffee Bean : 111 Life-Changing Ways to Create Positive Change
2023
You Win in the Locker Room First : The 7 C's to Build a Winning Team in Business, Sports, and Life
2016
The Energy Bus : 10 Rules to Fuel Your Life, Work, and Team with Positive Energy
2008
The Power of a Positive Team: Proven Principles and Practices That Make Great Teams Great (Unabridged)
2019