Born a princess of Schleswig-Holstein in 1858, Empress Augusta Victoria, known in the family as ‘Dona’, was marked out from early childhood as a potential bride for Prince William of Prussia. When they married in 1881, everyone expected that she would never concern herself with more than the traditional Prussian princess’s interests of Kirche, Küche, Kinder (church, kitchen, children). Yet within twenty years of his accession as William II, the last German Emperor, she would become in some ways the stronger character and steadying influence her increasingly neurotic and unstable husband required. This is the first biography of an often overlooked personality in modern history.