Everyone seems to be reading The Hunger Games Series right now, but there are a lot of entertaining and serious books written mainly for teen readers. As stated in our previous YA Steampunk post "Don't shy away from any of these because they target a younger audience. The plots and characters are often quite sophisticated and the themes can be very serious indeed. I find that the biggest differences are a little more angst (the main characters are often teens) and the language is a bit simpler (that means a faster read!)."
Sisters Red by Jackson Pearce. A modern retelling of Little Red Riding Hood, but with a feminist flair.