Catherine The Great by Henri Troyat

Born a minor German princess and transplanted into the Russian court, she sheds her original identity, learns the language and politics, and after orchestrating a coup against her ineffectual husband ascends to the throne; during a long, energetic reign she combines Enlightenment-inspired reforms in administration, law, education and the arts with ruthless political maneuvering and territorial expansion. Torn between public ambition and turbulent private life—marked by lovers, intrigues and the Pugachev uprising—she emerges as a complex, larger-than-life ruler who remade Russia into a major European power.

Purchase from Bookshop.org