Sins of the Empress — Paula Paul

Princess Sophia is fourteen when she is commanded to marry Peter III, heir to the Russian throne. She must change her name to Catherine, change her Lutheran faith to Russiian Orthodox, and she must produce a son. When Peter proves incapable of fathering children, she takes lovers to produce the son or risk losing everything. Her sexual and intellectual passions lead her into court intrigues that prove dangerous enough to threaten her life. She must save herself and Russia from Peter's inept rule and take the throne. Was she guilty of his murder? A rich and compelling story of ambition, love, sex, and intrigue.