"A captivating Cold War page-turner." — Real SimpleThe New York Times bestselling author of The Summer Wives returns with a gripping and profoundly human story of Cold War espionage and family devotion.In the autumn of 1948, Iris Digby vanishes from her London home with her American diplomat husband and their two children. The world is shocked by the family’s sensational disappearance. Were they eliminated by the Soviet intelligence service? Or have the Digbys defected to Mos