The fact that anyone could be taken in by the delirious pseudo-science presented in this book is a sad reflection on the level of mathematical innumeracy in our culture. For a free summary of much of the real arithmetic of energy: see http://dieoff.org/synopsis.htm. I can only imagine that the authors of this book have cynically concluded that telling people what they want to hear can be very profitable, even though all the actual evidence fails to support such false optimism. The authors' thesis is about as plausible as "Intelligent Design", and falls apart just as quickly when subjected to rational analysis. If you find yourself being lulled into a dangerous belief in this book's claims, then I've got an idea for a perpetual motion machine, to which I'd love to sell you the rights!Dave Hodgson [Graduate Electronic Engineer, US & Japan Patent Holder, for inventions that actually work!]