In 1942, Charlotte Gray, a young Scottish woman, goes to Occupied France on a dual mission: to run an apparently simple errand for a British special operations group and to search for her lover, an English airman called Peter Gregory, who has gone missing in action. In the small town of Lavaurette, Sebastian Faulks presents a microcosm of France and its agony in ‘the black years’, here is the full range of collaboration, from the tacit to the enthusiastic, as well as examples of extraordinary courage and altruism