In a captivating new historical novel by national bestselling author Kate Quinn, two women – a spy recruited during World War I in France for the real Alice Network and an unconventional American socialite searching for her cousin in 1947 – are brought together in a fascinating tale of courage and redemption.

In the chaotic post-war period of World War II, American college student Charlie St. Clair is pregnant, unmarried, and on the verge of being disowned by her very proper family. She also harbors the desperate hope that her beloved cousin Rose, who went missing in Nazi-occupied France during the war, might still be alive. When Charlie's parents send her to Europe to "resolve her little problem," she breaks free and sets off for London, determined to find out what happened to the cousin she loves like a sister.

In 1915, a year after the start of World War I, Eve Gardiner...