Hardcastle's Secret Agent - A Hardcastle & Marriott historical mystery Main - Large Print edition

August, 1939. As war looms, DI Walter Hardcastle is summoned to the office of Charles Marriot, Deputy Assistant Commissioner of CID at New Scotland Yard. Walter learns that he has been promoted to a senior role at V Division, and is plunged into a top secret case when burglaries occur at the homes of those working on a new type of war submarine.