Original Skin — David Mark

When “swinger” Simon Appleyard is found strung-up and naked in his apartment, the authorities are only too happy to chalk it up to suicide. After all, a new gang has taken over the local drug trade, and Detective Superintendant Trish Pharaoh's Serious and Organized Crime Unit is run ragged. A murder investigation is the last thing they need.

But more bodies begin to surface, and all are somehow connected to the underground erotic scene. Although Detective Sargeant Aector McAvoy would be perfectly content to stay home with his wife and their newborn baby, he begins to suspect that murder is just the beginning. As his investigation brings him uncomfortably close to the local political elite, McAvoy realizes he is hunting a sadistic killer with a lust that won't be satisfied until the River Humber runs red.