I have read the book. As for those people who say that such an accurate measure does not exist, this is utter rubbish. The book makes sense. But what was really surprising was to read that their findings have actually turned these two confirmed agnostics into believers in God. If this was simply a book written as a means to make money, they needn't have gone as far as saying that. Read it and decide for yourself. Me? I think they may just have cracked it.
Something is not right. This message is just to keep things from messing up down the road