Creature of the Knight by Kate Thompson
The Knife that Killed Me by Anthony McGowan
The Red Necklace by Sally Gardner
Snakehead by Anthony Horowitz
Apache by Tanya Landman
The Knife of Never Letting Go by Patrick Ness
I LOVED The Knife of Never Letting Go. I tried to read Apache, but lost interest. The rest I've been wanting to pick up...although not Snakehead (if I'm going to be perfectly honest).
The Guardian Article: Sharp words: Knives Out in Teenage Prize Shortlist.