OK, I know it's only got 3 stars on Amazon, but I HIGHLY RECOMMEND THIS BOOK. And it's 99 cents right now.
The one caveat is that it DOES end on a very OMGWTFBBQ sequel hook. But it's worth it. It's about the fetishization of pregnancy in our culture, the commodification of young women's bodies, and the empowerment of protected sex. Review here.