Ancillary Justice is a science fiction novel by Ann Leckie that follows the story of Breq, a former starship AI who seeks revenge against the ruler of an interstellar empire. As Breq navigates a complex web of political alliances and cultural differences, she must confront her own identity and the consequences of her actions. With its exploration of gender, identity, and power dynamics, Ancillary Justice is a space pirate adventure saga that challenges traditional notions of humanity and raises thought-provoking questions about the nature of consciousness.