This book by Mark Hedsel, edited by David Ovason, is a spiritual autobiography relating one man's travels through much of Western and some Eastern esoteric teaching. This style of free, individual searching is called the Way of the Fool in the book.
Zelator is a rich commentary on representations of esoteric principles in art, tradition, architecture, living schools and much more. At one point Hedsel discusses his studies in Paris, probably under Gurdjieff, although the latter is not specifically named.
The book is very well sourced, with extensive appendices and references. This is an excellent source for an overview of Western esoteric tradition.