The book's called "Harmful to Minors" by Judith Levine.
I've read it, and think it's very important and thought-provoking (although I think she may skate over some issues too lightly - but I tend to pick at everything I read ).
Appallingly, some fundamentalists and right-wingers tried to start a campaign against the publishers by claiming falsely that the book approved of child sexual abuse (which it absolutely does not). Levine said:
"In my book, I deplore any kind of non-consensual sex between persons of any age. But teens deserve respect for their decisions, and they need from us the emotional and practical tools to make good decisions."
If you're interested in finding out more, the publishers, University of Minnesota Press, have a page about the book with links to reviews and articles about it at: