I've never read anything like this before -- A hard-boiled detective novel wrapped up in a fantastial, weird, off-kilter world. What a story and what a ride.
Except for a strange and imperfectly-implemented sci-fi twist, it's a good noir cop story, with good characters and good narration. The sci-fi part, or maybe it's fantasy, is so subtle at first that it's hard to follow even though, or maybe because, all the characters understand perfectly. The ultimate explanation for the sci-fi part isn't especially believable, and it's hard to understand. The story is complex and hard to follow in audio; had I known, I probably would have read this rather than listening to it.
The idea of one city both next to and partially superimposed on the next city is intriguing. The mystic nature of the third city Orciny adds more interest. Very good story.
A fictional Balkland setting that stretches the reality there (and here) to where you see the absurdities of the frontier lines betweeen countries.