The Codebreaker's Daughter

Lillian once cracked ciphers during WWI--now, her daughter, Dinah, is trapped doing clerical work for the WWII OSS. Though Lillian is hesitant to return to wartime work, she is drawn to Washington, DC, by an old acquaintance. As a web of intrigue grows ever wider, mother and daughter must confront secrets in DC before the impending D-Day is compromised.