The light behind the window / Lucinda Riley.

This is an epic story of family secrets, love and betrayal between the Second World War and modern day France. 1998: Emilie de la Martinieres has always fought against her aristocratic background, but after the death of her glamorous, distant mother, she finds herself alone in the world and sole inheritor of her grand childhood home in the south of France. As she rediscovers her family's story, Emilie realizes that the Chateau may hold more secrets than just fond childhood memories. What is the tiny room concealed in the wine cellars below and why has it been sealed for the past fifty years? And why did her beloved father never speak of his decorated role in the Second World War? 1944: A promising young British office clerk, Constance Carruthers, is drafted as a spy into Paris during the climax of the conflict. Separated from her contact in her very first hours in France, she stumbles into the heart of a wealthy family who are caught up in the Resistance. Forced to surrender all ties to her homeland, she finds herself drawn into a complex new world where the War threatened to tear apart even the most unshakable of family ties.