Quiver

Tamsyn Webb has had to grow up fast. The dead walk, and they hunt the living.
∩╗┐One of the few safe places left in England is Gravesend, a small village turned into a fortress. Trapped with hundreds of starving, scared survivors, it's getting harder to tell who the monsters are – the ones beyond the walls, or those huddled behind them.
When Tamsyn learns of a possible cure for the zombie virus, there's only one option. She'll have to jump the wall, but nothing but her bow, a quiver-full of arrows, and the terror in her gut. But even if she gets back to Gravesend in one piece, Tamsyn might just doom them all…
It's a rotten new world. Tamsyn's only option? Be dead last.