(because you and I like a lot of the same books and you're one of the few who doesn't read sci-fi/fantasy exclusively.)
I loved The Age of Miracles. It's about a rather sci-fi theme (or is it?): the slowing of the earth's rotation. But what's good about it is that it's written from the perspective of a 12 year old girl. It's really, then, a coming of age story in a setting that is made plausible by the author's style. That it is a plausible idea and the characterization of the girl and her family is why I enjoyed it so much!
http://www.goodreads.com/book/show/1...ge-of-miracles