C.J. Box concludes his "Highway Quartet" with "Paradise Valley." A serial killer known as "The Lizard King" has been preying on truck stop prostitutes for years and he is finally slowing down. As this diabolical psychopath heads back to the wild western lands where he grew up he is leaving a trail of carnage behind him. And, in a weirdly twisted manner he is trying to recreate a family unit consisting of hostages he has harvested from among the innocents who have had the misfortune to meet him.