New York Times bestselling author Kate Elliott brings us a thrilling new science fiction adventure set in a rich universe full of political intrigue with Unconquerable Sun (Tor). Princess Sun has finally come of age. Growing up in the shadow of her mother, Eirene, has been no easy task. The legendary queen-marshal did what everyone thought impossible: expel the invaders and build Chaonia into a magnificent republic, one to be respected — and feared. But the cutthroat ambassador corps and conniving noble houses have never ceased to scheme — and they have plans that need Sun to be removed as heir, or better yet, dead. To survive, the princess must rely on her wits and companions: her biggest rival, her secret lover, and a dangerous…