Spiritual book suggestions?

alright im looking for a book that my teen class at my church can read. does anyone have any suggestions? The class is all girls who are are in grades 10-12. it just has to appropriot, please.

The Outsiders, by S.E. Hinton. it's kind of a rough book, but appropriate. I read it in my 7th grade english class, it's a very touching story, one of my favorites. and I read a lot.

I reccomend:
The Purpose Driven Life by Rick Warren
or maybe
Fasting by Jentezen Franklin
or books by Joyce Meyer