Another Question - Turning 12, Girl Needs post-Twilight Reading

I know versions of this question have been asked multiple times, and I know that I just asked a version of it (Twilight/Lord of the Rings reader seeks suggestions) but because this is a very very different age group, I'll ask again anyway:

for the girl just turning 12 who has read all the Twilight books, what should concerned relatives give to her to read, wanting her to expand her reading horizons?

All suggestions welcome, but I'm specifically looking for books with minimal sex and violence th...