Longarm and the Rock Springs reckoning

"After saving soiled dove Lucy Potter from two attackers, Longarm takes pity on the young woman. He buys her a new dress, gets her cleaned up, and takes her out for a fancy steak dinner. Lucy's got a good heart, and Longarm hopes his kindness might encourage the jaded prostitute to try another line of work. But before Lucy can begin her new life, she's killed by the same men who attacked her. Blinded by rage, Longarm can no longer see the line between justice and revenge. He turns in his badge and rides off after the killers. But as he trails them to Rock Springs, he learns the killing was premeditated--and greed was the motive"--