Mistress of Rome by Kate Quinn

Thea is a slave girl from Judaea, purchased as a toy for the spiteful heiress Lepida Pollia. Now she has infuriated her mistress by capturing the attention of Rome’s newest and most savage gladiator–and though his love brings Thea the first happiness of her life, their affair ends quickly when a jealous Lepida tears them apart.

Remaking herself as a singer for Rome’s aristocrats, Thea unwittingly attracts another admirer: the charismatic Emperor of Rome. But the passions of an all-powerful man come with a heavy price, and Thea finds herself fighting for both her soul and her sanity. Many have tried to destroy the Emperor: a vengeful gladiator, an upright senator, a tormented soldier, a Vestal Virgin. But in the end, the life of Domitian lies in the hands of one woman: the Emperor’s mistress.