Hide (Book Two, the Hunted)

Reid isn't sure if he's grateful to be alive. He's managed to save a small group of kids from the hunters, but only by trapping them all underground without food or water or a way out. If starvation doesn't kill them, thirst will. Still, they are out of the hunter's reach and that's something. Reid refuses to stop trying, even when the kids find out they aren't alone down there after all.