Citadel: A Novel

France, 1942. While war blazes at the front lines of Europe, in the walled southern city of Carcassonne, nestled deep in the Pyrenees, a group of courageous women is engaged in an equally lethal battle. Like their ancestors who fought northern invaders seven hundred years before, these members of the French Resistance—code-named Citadel—fight to liberate their home from the Nazis.

Led by a daring eighteen-year-old, Sandrine Vidal, and her elder sister, Marianne, the women of Citadel work qui...