This is a well-conceived, well presented, casually edited book. There are just too many inaccuracies. Reading it was like sitting through a PowerPoint presentation by someone who is an expert in the medium, not the message. Because the text is so often wrong about things I am knowledgeable about, I am less-than-confident about accepting all informantion about the subjects I know little about. It is, however, a great book to read and share with kids. Just don't use it to settle bar bets.