Have you read any of Leslie Ludy's books? What did you think?
I'm reading one right now, and all I can say is that it's convicting, inspiring, and eye-opening.
I would highly recommend her books to all my friends! She encourages us to lay aside self, and pour our lives into living for Christ! (I would suggest that you are under 13 years old that you have your parents read the books first, as she does address some topics geared for teens.)
Set-Apart Girl website