This book does so many things, and all outstandingly. It's a portrait of a Cahokia that in our timeline was never allowed to exist. It's a noir detective thriller. It's an intense character study of a deeply relatable protagonist. It's a love poem to 1920s jazz--the music and the cultural space it created.

I'm having difficulty actually talking about it coherently without massive spoilers. So just go on and read this book.