Forty years ago the Spirit of Vengeance-a Purpose-took William Morgan as its host, demanding he avenge the innocent by killing the guilty. Since then, Will has retreated behind Gar, a fa ade he uses to avoid dealing with what he's become. Cold, impassive, and devoid of emotion, Gar goes about his life alone-until his tidy, orderly world is upended when he meets Ryan, a broken young man cast out by his family. Spurred to action for reasons he can't...