Darkness Visible — J.M. Gregson

A Lambert and Hook mystery - When small-time drug dealer Darren Chivers narrowly escapes a police arrest, he begins to develop a different sort of criminal activity. Blackmail proves lucrative, but ultimately lethal. As Chief Superintendent Lambert and DS Hook interview the dead man's contacts, secrets tumble out as the investigation progresses and the solution to the puzzle is as startling as it is shocking . . .