Dirk De Wachter is a multi-bestselling author and psychiatrist-psychotherapist, serving as head of the Systemic and Family Therapy department at the University Psychiatric Center of KU Leuven, Kortenberg campus. He is also a trainer and supervisor in family therapy at various centers both in Belgium and abroad. The Art of Being Unhappy has sold over 100,000 copies in Belgium and the Netherlands, and has been translated into French, Arabic, Complex Chinese and Czech.