Hunger (Gone book #2), Michael Grant

An uneasy calm has settled over Perdido Beach. But soon, fear explodes into desperation as food supplies dwindle and starvation sets in.

More and more kids are developing strange powers and, just as frighteningly, so are the animals in the FAYZ: talking coyotes, swimming bats and deadly worms with razor-sharp teeth are just the beginning. For Sam Temple the strain of leadership is beginning to show and he's got more than just dwindling rations and in-fighting to worry about – Caine is back with the psychotic whiphand, Drake, by his side. And deep in the ground, the biggest danger of all is getting hungry .