Great book for 8-13 year old girls (especially ones who like American Girl stuff) about their bodies and how they change throughout puberty. Well written, very innocent (no sexuality is mentioned at all), and all pictures/diagrams are cartoons. I also love how they continually emphasize that every girl develops differently, at different times, and you should never compare yourself to anyone else - especially not anyone on TV! I'm impressed and looking forward to sharing this book with my daughter soon.