Three Little Maids (Unabridged‪)‬

When vengeance calls, death is its shadow. Billy Robertson is out for revenge and the target in his sights is Dennis Marks. Holding the DCI responsible for the death of his younger brother, Jack, Robertson seizes on the opportunity given to him by Harold Shaw - another violent criminal falling foul of the skill of one of the Met's finest detectives - from the confines of his cell at HMP Wandsworth. 

After his run-in with the IPCC, Marks is plunged into a murder case involving the death of a teacher at Lainsford Grammar School in Edmonton. Without the services of home office pathologist George Groves and with the prospect of his own team breaking up, Mark's abilities are tested to the limit as he follows a trail of false leads, lies, and a wall of silence.