The Risen Empire (Succession #1)

Captain Laurent Zai of Imperial Frigate Lynx must rescue the Child Empress, sister of immortal Emperor worshiped by 80 human worlds for 1600 years. Enemy Rix are machine-augmented humans who worship AI compound minds. Separated by light years, bound by an unlikely love, Zai and pacifist senator Nara Oxham face the Rix and hold the fate of the empire.