Ancillary Justice, written by Ann Leckie, is a thought-provoking space opera that follows a former starship AI named Breq, who seeks revenge against the ruler of an interstellar empire. The story explores themes of identity, power, and the nature of consciousness, while also delving into complex political machinations. With its unique narrative structure and exploration of gender and societal norms, Ancillary Justice has garnered critical acclaim and numerous awards.