Books in the Cassie Dewel series

An unprecedented oil strike in Willistown, North Dakota leaves the town a focal point for trouble. Law and order is a dim memory and the sheriff's department just can't build the jails fast enough.

It was Danielle and Gracie's secret. A 1000 mile drive to visit Danielle's boyfriend in Montana. But now the girls have simply vanished and Cassie Dewell's investigation will lead her to the FBI's Highway Serial Killer Task Force, a spate of roadside sexual mutilations and murders and the lair of a predator who styles himself The Lizard King.