A New York Times Bestselling Author
In 1948, Iris Digby vanishes from her London home with her American diplomat husband and their two children. Four years later, Ruth Macallister receives a postcard from the twin sister she hasn't seen since their catastrophic parting. Within days, Ruth is on her way to Moscow, posing as the wife of counterintelligence agent Sumner Fox in a precarious plot to extract the Digbys from behind the Iron Curtain. But the complex truth behind Iris's marriage defies Ruth's understanding, and as the sisters race toward safety, a dogged Soviet KGB officer forces them to make a heartbreaking choice between two irreconcilable loyalties.