Bertrand Cassoret is a graduate engineer and PhD in electrical engineering. As a Senior Lecturer at Université d’Artois in France, his research work concerns the energy efficiency of electrical machines and the improvement of electric motors. Over the past 15 years, he has taken a step back and become passionate about the problems related to energy: the dependence of our societies on energy, links between energy and economy or well-being, energy transition, nuclear energy, and renewable energy. He has published several articles and a book on these topics for the general public.