Transformation of Man Series - Monographs of lectures and talks given at the International Academy for Continuous Education, Sherborne House, Sherborne, Gloucestershire, England
John Godolphin Bennett (8 June 1897 – 13 December 1974) was a British mathematician, scientist, technologist, industrial research director and author. He is perhaps best known for his many books on psychology and spirituality, particularly on the teachings of G. I. Gurdjieff. Bennett met Gurdjieff in Istanbul in October 1920 and later helped to co-ordinate the work of Gurdjieff in England after Gurdjieff's arrival in Paris. He also was active in starting the British section of the Subud movement, and co-founded its British headquarters.
Seemingly an excellent summation of the life's work of J.G. Bennett in which his quest for spiritual truth which took him down many roads influenced by GI Gurdjieff, Sufi Mystics, Buddhism, and Shaivism, come together in one unified theory of the seven states of being one must embody to grow. I have not read a lot of Bennett, but feel like this is likely the one you should read if you are interested in his work, the Fourth Way, or are looking for something approaching a guidebook to spiritual growth.