Dr. Thomas Unnerstall, born in 1960, studied physics, mathematics and philosophy in Germany and the USA. After receiving his doctorate in physics, he first worked for several years in the Ministry of the Environment in Baden-Württemberg and then held management positions in the energy industry for over 20 years. Today he is an international consultant and book author. His books "Faktencheck Energiewende" and "Energiewende verstehen" have also been published by Springer-Verlag.