This is a wonderful, fitting end to the series, full of reveals that make you want to go back and reread the previous volumes to see where/whether the groundwork was laid. I've started re-listening to volume 1 and I am certain that Novik had this all planned out meticulously from the get-go. There was one half-chapter in here that I found irritatingly wandery and vague, but I loved everything else about it.