The Midnight Line

Reacher rides the bus north from Milwaukee. At a comfort stop he takes a stroll. Among the junk in a pawn shop window he notices a woman cadet's West Point class ring. Why would she pawn it? Reacher knows what she must have gone through to get it. He fights through a biker gang and a gangster, following the ring to the emptiness of Wyoming, in search of Major Serena Sanderson. Is she OK?