Amazon.com description: Product Description: The Psychological Commentaries on the teaching of Gurdjieff and Ouspensky by Maurice Nicoll are the best, most in depth and easiest to understand books on the subject of Gurdjieff's and Ouspensky's teachings. Everyone interested in Gurdjieff's and Ouspensky's teachings should read all five volumes. Regardless of what spiritual path a person is on, the psychological commentaries can be a big help because they detail on a day-to-day basis the obstacles the false personality creates and how to conquer and remove those obstacles. Very few books have ever been written that go into great detail exposing the tricks the imaginary I uses to prevent people from succeeding in their spiritual goals. The psychological commentaries do just that. The Psychological Commentaries is the classic work on the fundamental ideas of Gurdjieff and Ouspensky, expounded by one of their foremost students. The Commentaries, concerned with the immediate processes of applying certain principles in daily life, have come to be known and loved by entire generations of people interested in the ongoing evolution of psychological transformation. One of the leading British psychologists of his time, Maurice Nicoll was a student of Jung, Gurdjieff, and Ouspensky. At the latter's request, he devoted the last twenty years of his life to passing on the ideas he had received from his teachers. This devotion culminated in the five volumes of the Psychological Commentaries on the teaching of Gurdjieff & Ouspensky. The ISBN's are: Volume One 978-0-9829651-5-3. Volume Two 978-0-9829651-6-0. Volume Three 978-0-9829651-7-7. Volume Four 978-0-9829651-8-4. Volume Five 978-0-9829651-9-1.