This is easily one of the best books on Taoist (or Daoist) philosophy or Chinese shamanic practices I have read. It is well written, clear, and uncluttered by obscure references and terms. It is intended to explain some of the deeper history and meaning of the Yijing, or Book Of Change (not "Changes," as is often translated). It is also meant to instruct in the way of viewing the Universe as did the ancient shamans who created Yijing and what became formalized as Taoism (Daoism).
The book is organized as a series of eight lessons presented as if one were spending time with Master Wu at a retreat. Each lesson includes drinking tea, discussion of the history and meaning of certain aspects of trigrams, numbers, etc., as they relate to Yijing ("I Ching" in the Wade-Giles system). Qigong exercises to aid in the study are also included in each lessons.
I found the text remarkably refreshing and bursting with clarity and insight missing from every other text on the subject I have read. Not only are we treated to lessons on the historical derivations of trigrams and hexagrams, but also on deeper meanings in the bagua, numerology, and the interesting diagram called "hetu."
Master Wu's writing is clear and informative without being obscure or pedantic. One really gets the flavor of sitting with a genuine Master in pristine settings and absorbing the knowledge as one would absorb sunlight and a good meal. It is relaxed but instructive, and while not organized in "cookbook" fashion, there is a great deal of information here that would require (and deserves) long and in depth study. This is not a book one simply reads, this is a book to study and review, over and over again.
The qigong exercises are also interesting, and I intend to add them to my practices.
I was intrigued in particular by some of the numerology and the hetu, which I find closely linked to advanced physics, math, and the work of people like Viktor Schauberger. There is indeed much which remains forgotten in the mists of time...
If you are interested in Yijing, Chinese (or Asian) religion, philosophy, or culture, then I would heartily recommend this book. If what you are after is a quick, New Agey cookbook for playing with prediction, don't bother. This book is for serious students of these topics and does not lend itself to instant party trick kinds of things. (On the other hand, it may also lead you into more serious study.....)
A great book. I look forward to more of Master Wu's work.s