The Enigma Files

Nick Lewis's forced transfer to the Prisoners' Property Office promises nothing but boredom and the antagonism of Kate Burton—but it also nearly costs him his life.

Nick Lewis vanishes while investigating the disappearance of heiress Caroline Bates.

Lewis becomes emotionally involved with a suspect when the file on Arnold Humble's accidental death is re-opened.

Forger William Swain has died in prison so DCI Adams is ordered to track down the engraving plates and any counterfeit money left in circulation.

Nick Lewis and fellow officer Joe Mackie find themselves under investigation from Criminal Investigations when a convicted prisoner gives their names to DCI Lowson

Phil Strong is given discarded fake charity boxes left on a rubbish tip to find their origin. DCI Nick Lewis, however, considers it evidence and needs to be investigated despite the low amount of money stolen.