Andrew Z. Thomas novels

Lt. Jacqueline "Jack" Daniels has seen humanity at its most depraved and terrifying. Luther Kite is humanity at its most depraved and terrifying. He's committed unthinkable acts. Taken human life for the sheer pleasure of it. Each is the best at what they do. Luther wants a challenge, and sets his depraved sights on Jack. But with a baby on the way, Jack is at her most vulnerable.