Hey I really want to give some books to a few of my friends as they all go back to university. I really like "A Purpose Driven Life" but it is a bit long and not really about selling Christianity. It's so well written and powerful and I was wondering if there was something similar but aimed at non-Christians. I was hoping to give them something they could keep and look at and remember and that really communicates how awesome and amazing it is to know God- please any ideas?