The Innocent Spy: Ted Stratton #1 (Felony & Mayhem Mysteries) Reprint edition

Diana Calthorp is a society beauty, escaping a loveless marriage by doing just a little spying for MI5. Ted Stratton is a working-class copper, poking with little passion into the death of a sad, middle-aged woman. In an ordinary world, their paths would never cross, but the war has turned the world on its head. When the two start chatting, they discover they have more in common than one might imagine. Both of them are running up against very peculiar and very solid roadblocks. Could collaboration help find ways around the obstacles?