This is a dystopian sci-fi centered around Kyr, star pupil of the military academy of the remnant of human civilization living on a space station. She is an unpleasant character, hell-bent on seeking revenge for the destruction of humanity. And then... things shift, as her life's path turns into something she was not expecting, and she has to deal with it. I absolutely scarfed up this book in one day (and it had been a long time since I'd done that). I loved the world-building, the themes, the characters (awful though some of them were), the very real choices Kyr had to make at every turn, and a lot more. Something that started out as straight-up military sci-fi turned into a something else whole lot more thought-provoking.