It is the first book of David Childress I've read, and I must say, it only left me more doubts, instead of ideas, theorys, or whatelse.
My concept of a researcher (I'm not saying that he is not one) is that of one who can put me on the center of an issue, show me facts clearly and with objectivity, and finally solve the "enigma" with his ideas, theorys or in many cases, provide with more tools to get closer to solve it.
After reading this book I got information about facts, but not even a clue on the part that we all expect from a researcher. For example he makes an approach on the significance of the entwisted serpents with the winged scepter, suggesting that it means some kind of flying machine powered by mercury, wich could sound interesting. But, why doesn't he describes this procedure on an accurate base (technical information) in order to leave us a chance to evaluate this possibility?
For an example read Christopher Dunn's The Gysa Power Plant book, wich is a great work, in my opinion.
Finally I could only say that as a reader and architect, acoustic technical, builder, I would be thrilled if he could put any of the issues that he describes, on a more cientific and accurate basis.