Against Nature - A Duck Darley Novel Author:Casey Barrett Unlicensed P.I. Duck Darley has found a comfortable niche above the streets of Manhattan. But a desperate text from Cass Kimball, the partner Duck once took a bullet to protect, lures him back into sworn-off vices and the sinister world of professional sports . . . — — Cass cries murder after her boyfriend tumbles to his death in the Catskills w... more »hile researching the history of sports doping in East Germany during the Cold War. Following the brutal killing of a champion javelin thrower, Cass herself is arrested on charges of double homicide, leaving Duck on an impossible quest for answers. Caught between the illicit underbelly of competitive sports and the shadowy criminals stalking him, it?s sink or swim as Duck stumbles through a reckless investigation that endangers both his life and that of anyone he allows himself to hold dear.