I had to read this book for 8th grade Language Arts in FLVS. Anyway, I used to love reading when I was 10 or 11ish, I would read like 400 books a year, but I've lost my interest for it. Since I don't enjoy reading, and it was a required thing, I didn't really get INTO the book and study it, I was just kind of skimming to get it over with. I did like the basic story, I think it had many possible 'themes' and morals, I found it kind of funny because I had just gotten into an issue where I had to lie for my best friend, and then here's this book I have to read, about some chick that lies for her best friend. Anyway, I think the book is somewhat short and probably meant for 9-12 year olds, I don't think it's very interesting for 13+. The book is very well written, and it's a good story. I think it would of been much more interesting if I were a few years younger though. So 9-12, definitely, 13+, you may want to pick something a little more age appropriate. It does include the 'd' word once, but I was totally expecting it closer to the beginning of the book since it's dealing with Nazis... you kind of expect adult male soldier peoples to curse. As for all this crud people are saying about "language, violence, bad content...." they're really picking on every single thing they can use as an excuse to give someone else's brilliant work a bad review. Don't listen to them, this book is outstanding for younger readers.