Richard Dawkins " The Magic Of Reality: How we know what's really true" (Black Swan)
Richard Dawkins is a biologist, but he also loves writing books about evolution, science, and atheism. In this case, he's writing in a lighter style, obviously targeted at a younger audience which I had not realised until I started reading it. He gives religion equal treatment to other myths and legends and, while this might be upsetting to some people, I think he does a good job of not being too pushy.
He takes popular myths, gives a bit of background about them, especially rationalising why people tended to believe in them and then explains the phenomena and why they are just myths and not reality. The science is good, although sometimes his explanations are a bit convoluted (especially because he's trying to keep it simple and not use too many complicated terms or notions) - which is ok for me as a grown-up. I have a feeling certain parts of the book would bore a young reader or confuse them, but this book is ideally read by a parent together with the kids so that things can be explained when they get too confusing.
Overall a great read and highly recommended for those wanting a "lighter" Dawkins experience.