Faceless Strangers is the fourth novel in the series of tie-in books, written by Nigel McCrery. It was first published on 3rd September 2001.
"When the wife and beau of a local member of parliament is found dead in her own home, Superintendent Tom Adams calls upon Sam and the entire resources of the Cambridge Constabulary, in an attempt to further his career, and solve the case as quickly as possible. However, his investigation is halted by the discovery of the decomposed body of a homeless drug addict in the local underground toilet block. When Adams dimisses the death as an open and shut case, one of his juniors, DS Stanley Sharman, decides to enlist Sam's help, to discover the indentity of the dead woman – and discover just who is responsible for her death. Meanwhile, Adams is determined to crack his case."