KHA Records' Gurdjieff "Hidden Sources" - Information about and online ordering of Alessandra Celletti's interpretations of the music of Gurdjieff and de Hartmann. Gilgamesh Publishing - Offering book catalog, souvenirs, and photographs. Bennett Books - Specializes in publishing and selling books and tapes online. Main titles from John G. Bennett, G. I. Gurdjieff, P. D. Ouspensky and Sufism. Traditional Studies Press - Information on Gurdjieff and a catalogue of the books this small publisher brings out. By The Way Books - Offers a unique selection of rare, out-of-print and select new books. Most are related to mysticism, metaphysics, philosophy, psychology or religion, particular emphasis on G.I. Gurdjieff and The Fourth Way. Akhaldan II Press - Online shop and presentation for the book featuring Reich and Gurdjieff: Sexuality and the Evolution of Consciousness by David M. Brahinsky, Ph.D. Eureka Booksellers and Editions - Publishers and sellers of books specializing in the works of P.D. Ouspensky and Maurice Nicoll. G-H Records - Online ordering and information from the publishers of the original recordings of piano pieces performed by Thomas de Hartmann playing "The Music of Gurdjieff/de Hartmann" (3 CDs or 4 audio cassettes).