From the bestselling author of The Secret Midwife and The Berlin Sisters comes an inspiring story of friendship, hope and courage.

New York, 1942: Avery is engaged to be married. Longing for adventure instead, she jumps at an unexpected offer to trade her library job for undercover intelligence-gathering in Portugal. But her new life in Lisbon, known as the Capital of Espionage, challenges everything she thought she knew about herself.

Local bookshop owner Camille, a French widow with access to the enemy newspapers and magazines Avery needs, befriends her. But are the rumours that swirl around Camille true--does she really have a Nazi boyfriend? And what secrets did she bring with her when she fled France? Avery must decide--fast--if she can fully trust Camille. Millions of lives depend on it.

As Avery discovers more about Camille's world, she realises that living in a city of spies will take all her courage. With suspicions growing, they are both playing a terrifyingly dangerous game. And not everyone will live to tell their story. Can Avery and Camille stay far enough ahead of their enemies to survive?

Threaded through with daring, sacrifice and love, this is the inspirational story of two women prepared to risk everything to help others survive the horrors of World War II.