A treasury of traditional wisdom. London: Allen and Unwin, 1971 / New York: Simon and Schuster, 1971, Bedfont, Middlesex: Perennial Books, 1981, San Francisco: Harper & Row, 1986, Cambridge: Quinta Essentia. 1991, Louisville, KY: Fons Vitae, 2000.
Gurdjieff, in the light of tradition. Bedfont: Perennial Books, 1978.
The Widening Breach: Evolutionism in the Mirror of Cosmology. Cambridge: QuintaEssentia, 1995.
Challenges to a Secular Society. NP: Foundation for Traditional Studies, 1996.
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