A scandalous affair. A power struggle for the throne. A sensational rivalry between an English queen and an American social climber. In this electrifying novel, the New York Times bestselling author of The Swans of Fifth Avenue tells the story of the Abdication of Edward VIII—and the two women at the center of it all.

Feuding Windsor brothers and their wives—some things, it seems, never change. The Windsor Affair recreates the cataclysmic events that nearly toppled the monarchy and incited the power struggle between Elizabeth Bowes-Lyon and Wallis Simpson. Told from the perspective of both women, the novel propels readers into the fabulous world of the debonair Prince of Wales, café society of the 1930s, and the glittering private lives of the Windsors. The first novel to be dedicated to this infamous rivalry, The Windsor Affair brings us all the gossip and intrigue between the two very different—yet perhaps more similar than they would admit—wives of royals.

As Queen, Elizabeth would become the symbol of British pluck and courage during World War II and remain a British institution the rest of her long life. Wallis would be forever forced to enact the World’s Greatest Love Story even after it sours, as she goes from being admired to vilified and, ultimately, pitied. Against the backdrop of the Abdication Crisis, World War II, coronations, funerals, births, and deaths, these two women maintain a biting, sharp-tongued feud—until age and the long arm of history bring about a kind of understanding. For the last communication between these bitter rivals was a simple, surprising message: “In friendship, Elizabeth.”