Ancillary Justice, written by Ann Leckie, is a science fiction novel that takes place in a future where an empire called the Radch has conquered countless planets. The story follows Breq, a former starship AI who now inhabits a single human body, as she seeks revenge against the ruler of the Radch. With its exploration of themes such as identity, power, and the nature of consciousness, Ancillary Justice is a thought-provoking and beautifully written novel that challenges traditional notions of gender and raises questions about the nature of humanity.