Peter Selg was born in 1963 in Stuttgart and studied medicine in Witten-Herdecke, Zurich, and Berlin. Until 2000, he worked as the head physician of the juvenile psychiatry department of Herdecke hospital in Germany. Dr. Selg is now director of the Ita Wegman Institute for Basic Research into Anthroposophy (Arlesheim, Switzerland) and professor of medicine at the Alanus University of Arts and Social Sciences (Germany). He lectures extensively and is the author of numerous books, many of which have been published in English. Margot M. Saar studied at the Universitat des Saarlandes, at Open University, UK, and at Institut fur Waldorfpadagogik Witten Annen, Germany. She is an experienced translator and interpreter in specialty fields (education, medicine, philosophy, anthroposophy, homeopathy, anthroposophic medicine, general science). She has been a foreign language teacher at Michael House School Derbyshire, UK, a teacher of foreign languages and philosophy, exam officer, and upper school mentor at Michael Hall School, East Sussex, and translator of technical manuals and legal contracts, international correspondence, office management at Huls Troisdorf AG Witten Germany. Margot has translated numerous books for SteinerBooks, including Peter Selg's 7-volume biography of Rudolf Steiner.