Wasn't most of the claims in that book refuted, some even by the author. I really enjoyed it and found some great insights only to be later told by a friend in that sphere that the book was not correct and even the author had "retracted" some of the assertions.
One quick google search and you can find multiple links for that, including some that were posted here. wasn't proven to be false but that the evidence used was not much of evidence either.
