The eighteenth century was an era of violent contrasts and radical change, intellectual brilliance and war, spies and diplomatic intrigue, elegance and cruelty. One of the century’s most mysterious figures was the Chevalier d’Eon, who lived as both man and woman, French spy and European celebrity. Written from the perspective of this historical figure, the novel by Brian O’Doherty reveals d’Eon’s radical modernity.