Biographie de l'auteur
is the recognized expert in the psychology of peak performance, he has spent more than a quarter of a century serving people from more than 80 nations around the world. He is an international bestselling author. His educational audio system, Personal Power
, has sold more than 35 million units worldwide. His clients have included an extraordinary array of outstanding achievers, including presidents of the United States, members of two royal families, Olympic and professional athletes, and Fortune 500 CEOs, and he has addressed distinguished audiences ranging from Britain’s Parliament to the Harvard Business School.