Wow. This is the first real world-building scifi I've read in a while that wasn't a continuation of an existing world, so the first few chapters were a bit of a wade as it set the scene. Then the book took off and I couldn't put it down.

A lot's been made of the way Leckie handles gender, and it is an interesting detail. Personally, I also really appreciated a related part of this world: that languages are hard. So much scifi waves away all language problems with some kind of magic translator, but in this book it's repeatedly made clear that characters have to invest time and effort into learning each others' languages, those who haven't put in the effort simply can't communicate, and those who have routinetly find some things easier to say in some languages than others. It's one of those details that helped make a world in which there's a lot of almost-invincible tech and so on feel that much more real.