Beelzebub's Tales to His Grandson is the first volume of the  All and Everything trilogy written by the mystic  G. I. Gurdjieff. The All and Everything trilogy also includes Meetings with Remarkable Men and Life Is Real Only Then, When 'I Am'. This book was intended to be the main study tool for Gurdjieff's Fourth Way teachings. As Gurdjieff's idea of "work" is central to those teachings, Gurdjieff went to great lengths in order to increase the effort needed to read and understand it.The book covers many topics. 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 that has yet been seen."

Here is a series of talks and lectures as well as a personal account of the master's spiritual and philosophical development providing specific suggestions and practices for achieving inner knowledge. The purpose of this series, according to Gurdjieff, is to assist the arising - in the mentation and in the feelings of the reader - of a veritable, non-fantastic representation, not of that illusory world which he now perceives, but of the world existing in reality. 

These are the memoirs of the great mystic and teacher who inspired a generation of disciples and followers before, during and briefing after the Second World War. In Meetings With Remarkable Men Gurdjieff introduces us to some of the companions he encountered in his travels to the most remote regions of Central Asia. With colorful episodes from his adventures, he brings to life the story of his own relentless search for a real and universal knowledge.