The Goodnight Song (Detective Rhodes and Radley Series #2)

Gifted criminal profiler Nathan Radley has a unique way of thinking that allows him to empathize with the twisted killers he helps capture. But Nathan a dark secret. He has more in common with the criminals he hunts than anyone could dare to imagine. He lives in constant fear of losing control of his own dark desires... When the headless body of a policeman is dragged from the Thames – an exact enactment of one of his oldest and darkest fantasies, only ever confessed in the pages of his tee...