No Way Back — Ethan Flagg

Cole Rickard returns to the Arizona town of Maverick, hoping to make amends for an ignominious departure five years previously. His status as the Reno Kid, a ruthless bounty hunter and fast gun, has made him the target of young hotheads eager to snatch away what he now considers to be a crown of thorns. Cole wants nothing more than to settle down. But shucking such a dubious reputation is tough: there will always be somebody waiting to call him out...