21 jours sans se plaindre: Changez d'habitude, changez votre vie, changez le monde.
2015
Complaint Free Relationships: How to Positively Transform Your Personal, Work, and Love Relationships (Unabridged)
2009
Happy This Year!: The Secret to Getting Happy Once and for All (Unabridged)
2013
A Complaint Free World, Revised and Updated: Stop Complaining, Start Living (Unabridged)
2024
Happy Stories!: Real-Life Inspirational Stories from Around the World That Will Raise Your Happiness Level (Unabridged)
2014
Un mundo sin quejas
2013