The Cambridge Siren

Autumn 1941. As the war continues and Cambridge endures nightly air raids, its bomb shelters are packed with those driven by the sound of the siren. At dawn, a young man is found dead in a shadowy corner, apparently a suicide, yet Detective Inspector Eden Brooke suspects otherwise: the stranger bears a tropical tan and Brooke's office number on his hand.

With police stretched thin over a case of sabotage at a factory making periscopes, fear grips the city. Brooke follows a dark trail to the university, where a laboratory conceals a brutal secret and the key to a wartime killer's deadly game.