Investigator Cassie Dewell is on the trail of a serial killer in the book that inspired the series Big Sky. There's a killer on the road... It was Danielle and Gracie's secret. A teenage adventure. A 1,000-mile drive along the spine of the Rocky Mountains to visit Danielle's boyfriend in Montana. When rookie cop Cassie Dewell catches her mentor and friend, Investigator Cody Hoyt, planting evidence, he is suspended from the force, his reputation in tatters. He's already drowning his sorrows when his son calls. His girlfriend and her sister have disappeared. Unable to investigate himself, Cody turns to his prot?g?e for her help finding the girls. Soon they discover that Danielle and Gracie aren't the first to disappear in the area. When Cody, goes missing too, it's up to Cassie to find them. Before it's too late. C.J. Box is the author of twenty-two Joe Pickett novels, five stand-alone novels, and a story collection. He has won Edgar, Anthony, Macavity, Gumshoe, and Barry Awards, as well as the French Prix Calibre .38. He has been a Los Angeles Times Book Prize finalist, and his books have been translated into twenty-seven languages. A Wyoming native, Box has also worked on a ranch and as a small-town newspaper reporter and editor. He lives outside Cheyenne with his family.