Ancillary Justice is a cyborg soldiers and AI spaceships novel (with complications) in a space opera setting, built around a soldier called Breq. Think Iain M Banks but with the Roman Empire instead of plush toy communism. The complications are both cool and fundamental to the characters, and I won’t spoil the slow reveal of the first book here, even though it’s all over the web.
The trilogy is completed with Ancillary Sword and Ancillary Mercy. After the galaxy-spanning wandering of the first book, racing towards the capital, the second and third books focus back on a particular system. Breq muscles in as a fleet captain of a capital ship. Aliens, ships and stations join the cast of characters. Interpersonal and gunboat diplomacy ensue.
The heavy Space Roman Empire vibe of the first volume evolves into something a bit more Space Girls Boarding School Naval Academy in the later books. Though both have their virtues, I always tend to favour first books, and the thick vertigo of new ideas is denser in Ancillary Justice than the other two volumes. I still devoured all three at speed and with pleasure.
The Ancillary trilogy is, at some level, network space opera, about synchronization, replication, latency and packet corruption. The empire exists because it successfully replicates itself over distance and time. And then it stops: packet loss and fragmentation.