Psychologists Fred Sterk & Sjoerd Swaen are bestselling self-help authors in the Netherlands.
Background
Information
Psychologists Fred Sterk and Sjoerd Swaen are, in addition to their work as psychotherapists, bestselling authors of a series of successful self-help books.
Their books are widely used in the Netherlands as ‘motivation-books’ in the areas of mental-health, education and business/management.