Book excerpt: As Nature tires of human destruction, two sisters must face a changing environment that stands between them and survival. When Quinn and Riley set out on a family vacation with their parents, the trip ends before it begins. Mother Nature interferes with their plans, setting off a sequence of events that thrusts the teens into a hostile landscape. Stranded, with limited supplies, struggling to figure out who they can trust along the way, they must determine how to survive Nature's evolving fury.