"In July 1830, a revolution ousted the Bourbon monarchy from France. The royal family was in exile. From a drafty Scottish castle, the Duchess of Berry hatched a plot to restore the dynasty and, after two years of careful planning, she launched a civil war to reclaim the throne for her eleven-year-old son. She instantly became the most wanted woman in France, and she evaded capture for months by disguising herself as a man, sleeping in fields and...