Beelzebub's Tales to His Grandson or An Objectively Impartial Criticism of the Life of Man is the first volume of the All and Everything trilogy written by the Greek-Armenian mystic G. I. Gurdjieff. The All and Everything trilogy also includes Meetings with Remarkable Men (first published in 1963) and Life Is Real Only Then, When 'I Am' (first privately printed in 1974). Beelzebub's Tales is included in Martin Seymour-Smith's 100 Most Influential Books Ever Written, with the comment that it is "...the most convincing fusion of Eastern and Western thought has yet been seen."