The Big Five for Life (Unabridged)
2025
The Big Five for Life (German Edition): Was Wirklich Zählt im Leben [What Really Matters in Life] (Unabridged)
2019
Das Café am Rande der Welt [The Cafe on the Edge of the World]: Eine Erzählung über den Sinn des Lebens [A Narrative About the Meaning of Life] (Unabridged)
2019
Safari des Lebens [Life Safari] (Unabridged)
2019
The Why Cafe (Unabridged)
2019
Was ich gelernt habe [What I Have Learned]: Erkenntnisse für ein glückliches Leben [Findings for a Happy Life] (Unabridged)
2024