The third in the Ancillary Blah series, and the culmination of the trilogy. Also, in my opinion, a bit disappointing. Things kinda get sorted out to a degree, with an appropriately don't-fix-the-entire-universe ending. The disappointment comes from just not exploring the possibilities available. The Presger are involved, relatively boringly. A bunch of spare AIs turn up and nothing's really done with them. That Dyson sphere from the previous book just isn't mentioned. Instead, there's a lot of counselling for young and emotionally distressed officers. Er, yay? The previous books didn't exactly avoid this, but I wasn't desperately hoping for more.