Natural Enemies — Warren Adler

In this fast-paced thriller, a young New York couple, unable to have children and their marriage on the rocks, is advised to leave their tense urban lives and take a vacation in a more peaceful and relaxed environment. Heading out west, they are pursued by violent rednecks and driven into the wilderness. They soon find themselves battling against the ruthless and relentless cruelty of nature itself. Braving floods, avalanches, wild animals and human predators, they come face-to-face with death. Their terrifying ordeal and the discovery of a powerful instinct for survival gives the couple new insights into themselves as they confront an uncertain future.