The Duchess, the second novel in Wendy Holden's trilogy about royal outsiders, fictionalises the unknown London life of Wallis Simpson. Arriving in 1928, Wallis was a divorced, penniless, middle-aged foreigner with average looks and no connections. Yet, just eight years later, a king renounced his throne for her. How did a woman from nowhere capture the heart of the world's most glamorous bachelor? Wendy Holden tells the amazing story.