I want to write a review without spoilers - which is rather difficult, I find, because so many things are intertwined and connected in this amazing book that I can't seem to say much without giving away one twist or another.

Therefore let me say that the author is terrifyingly clever about leaving hints all over the place to things much further along in the book. This book deserves attention, and close-reading, if you really want to appreciate it. Also it's really great fun to form hypotheses and then see them turn out right, concerning who is who and what is what.
The characters are all brilliantly developed - the ones one tends to sympathise with more as well as the ones one tends to do so less. Because there simply isn't any juxtaposition of good and evil - no one is just one, and some maybe need a different scale altogether.
Another wonderful thing is how the author manages to present topics such as race or origin and the implications thereof as well as totalitarian political systems on the go, showing their negative consequences without getting out the moral sledge hammer. There are characters who fall outside heteronormativity, concerning sexuality as well as sex/gender or "traditional relationship/family models". But the representation feels very natural in that these characters aren't there mainly or just for that. They have a ton of other defining characteristics and motives, and then they also happen to be part of what in our reality would be termed the LGBTQ+ community.

It was 1 a.m. when I read the last pages and finally fell asleep with a turmoil of emoitions because on the one hand one of my favourite characters [...] - but on the other hand another one [...]. I can't write any of that for a spoiler-free review. So just go read the book and see how you feel in the end.