Ancillary Justice is a science fiction novel written by Ann Leckie. Set in a future where an empire spans across thousands of planets, the story follows Breq, a former starship AI who now inhabits a single human body. Breq seeks revenge against the ruler of the empire, and her journey takes her on a thrilling adventure filled with political intrigue and questions of identity. This award-winning book explores themes of gender, power, and the nature of consciousness.