10x Is Easier Than 2x: How World-Class Entrepreneurs Achieve More by Doing Less (Unabridged)
2023
Who Not How: The Formula to Achieve Bigger Goals Through Accelerating Teamwork (Unabridged)
2020
Das GAP-and-GAIN-Konzept
2023
The Gap and the Gain: The High Achievers' Guide to Happiness, Confidence, and Success (Unabridged)
2021
Thinking About Your Thinking: Your Wonderful, Secret, Lifetime Collaboration with Your Own Brain (Unabridged)
2024
American Happiness: Eight Mindsets Enabling You to Bet Your Future on Yourself. (Unabridged)
2024