A very well written book. Easy to read and very interesting. The author makes it clear that he is going to use historical sources (i.e. based on fact) and wasn't going to lean on religious sources with no basis of fact i.e. based on faith. So I clearly don't understand some of the 1 star reviews who are basically moaning because the author doesn't back up their faith based on no evidence at all. This is a fair and excellent analysis and is ground braking in covering the rise of world religion. Good book.