I just read that and enjoyed it too. It's pretty heavy and sad story though, and I think in some places the writing might be hard for a tween to understand- but like hbridge I didn't read it with a lens for tweens. I could see a teen/HS student reading it but feel that it would be over the head of most tweens.
Re inappropriateness- there is some violence, death and tension. The rape scene is toward the end and I don't think it was overly graphic but it is clear what is going on-- it is toward the end of the book, one of the supporting characters is living in a foster/orphan home in Germany when the Russian soldiers come to town, and well, do what soldiers do when they take over the town of their enemy.
DD is twelve and a big reader but I can't see her reading this one at all. But if she did, I don't think I'd stop her- though I suspect she'd put it down because she found it hard to follow and/or too sad.
Jen, mom to "Little Miss Tiny" 4/07