Deadly by Julie Chibbaro and it is fabulous!
It gets an A+ on the Mattie Gokey Scale of General Awesomeness.
And you will hear more about that when I post my review closer to the pub date (February 22, 2011 - alas!).
Put this one on your radar, kids!
(You know who Mattie Gokey is, right? From Jennifer Donnelly's fantastic A Northern Light? If not, I insist you go out and read that right away.)