Yeah, I don't know what I'm going to do about Twilight -- it doesn't seem terribly healthy. Probably the same thing I did about the very heteronormative volume of Babymouse that she brought home the other day: let her read it but say a lot of things like, "Don't you think it's silly that she bases her happiness on what boys think? I think it would be a better story if she went to college, rather than becoming a mother when she's so young," and so on.

ETA: There's a fair bit of Ursula K. LeGuin that should be accessible to an eleven-year-old, too.