G.I. Gurdjieff, the Greek-Armenian mystic and spiritual teacher who introduced and taught the Fourth Way, authored three literary works that comprise his "All and Everything" trilogy. The best known, "Meetings with Remarkable Men", a memoir of Gurdjieff's youthful search for spiritual truth, has become a minor classic. Peter Brook made it into a film (1979). The trilogy also includes "Beelzebub's Tales to His Grandson", a curious melange of philosophy, humor and science-fiction that some regard as a masterpiece. P.L. Travers, author of the Mary Poppins series and a disciple of Gurdjieff, described "Beelzebub" as "soaring off into space, like a great, lumbering flying cathedral". Martin Seymour-Smith included "Beelzebub" in his "100 Most Influential Books Ever Written", characterising it as "...the most convincing fusion of Eastern and Western thought that has yet been seen." Gurdjieff's final volume, "Life is Real Only Then, When 'I Am, consists of an incomplete text published posthumously.