Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Zollikon Seminars were a series of philosophical seminars delivered between 1959 and 1969 by the German philosopher Martin Heidegger at the home of Swiss psychiatrist Medard Boss. The topic of the seminars was Heidegger''s ontology and phenomenology as it pertained to the theory and praxis of medicine, psychology, psychiatry and psychotherapy. The protocols of the seminars, along with correspondences between Heidegger and Boss, were published in German in 1987 under the title Zollikoner Seminare, Protokolle- Gersprache- Briefe Herausgegeben von Medard Boss. The English version of the text was published in 2001.Boss was a psychoanalytic psychiatrist trained within the framework of natural scientific medicine. During active military duty as a field doctor during World War II (which "all Swiss men who were not psychologically impaired were required to do"), Boss read Heidegger''s dense and often complicated text, Being and Time.