Interesting
I found this to a very interesting book. I especially enjoyed the way the author presented the information, not as completed fact, rather as the latest working hypothesis that is standing up to the tests of science. He offered alternative points of view and stated things clearly enough that layman, such as myself, could understand them. The controversial aspects of the book are actually fairly treated in contrast with what people have said about it. It does drag a bit in parts as some theories are explored in more detail than my interest could sustain. All in all, fascinating and informative.