"Caraval" by Stephanie Garber

Um.  Wow.  So, yeah.  I binge-read Caraval.  Four hundred pages in two days.  While also teaching my kids, cooking meals, etc.  I can't remember the last time I read a new-to-me straight-up fantasy book that I liked this much.  Probably, The Graveyard Book  by Neil Gaiman was the last time I just fell into a fantasy world and didn't want to come out.
(MILD SPOILERS follow, basically just about whether or not some characters survive to the end of the book.)

As usual, it wasn't the fantasy world that...