Ancillary Justice, written by Ann Leckie, is a science fiction novel set in a future where an empire called the Radch rules over countless star systems. 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 identity, power, and the nature of humanity, Ancillary Justice is a thought-provoking and beautifully written book that challenges traditional notions of gender and personhood.