I haven't bought this book - my kids are 11 and 9 and I wanted something that would explain everything clearly, which it looks like this does. I am a big fan of Usborne. However, I did the Look Inside thing before buying and while I loved the beginning bit about growth, I then turned to the glossary and oo-er... Acne, yes, helpful. Adultery, well, I suppose it's in lots of books and films, so yes it's relevant. Anal sex... What?! I would like to think kids don't need to know about that surely?! Maybe it is handled in a very sensible way in the text, but frankly, I couldn't bring myself to buy it. Just a bit too far too soon, so I think I will wait a few years. Oh dear, what's the world coming to?!