Maybe you are right and it was a quick read after all --- it didn't feel like that to me because it took me several days to get through it. Thinking about that though that may be because I usually read it on the train, not at home (I currently have an at-home book that is too big to carry around, which I've been reading for about two months now, and differing out-of-home books on the side, which slows up processes.), though the ending I read at home when I couldn't stop.
I think the Fallen Man is someone who ejected himself out of an airplane - but we haven't heard mention of any airplanes yet, which means, if I'm right, there must be a world outside the Colourtocracy.
I read on the author's website that the Badly Drawn Map is a real map, namely, the Mappa Mundi that is on display in - I think - Hereford. It also said there that the Oz memorial is for a puppeteer.
I'm wondering what the deal is with swans. Are they really as dangerous (mutations) or are they a myth? Are there even swans in that world?
Also, I think I don't quite get the concept of the Mildew. It sounds like it is rotting away while still alive, which - yuck.
"I want you to know that you matter. I want you to know that your lives matter, that your dreams matter." (Barack Obama, 03 June 2020)