This was a great book. It started a little vaguely for me, mostly because it had been more than a year since I read the previous safehold books. It came back quickly, and proved enjoyable again. I read it very quickly; I got sucked in.
The book is kind of a muddle– it starts in the middle of an invasion (without the buildup– that was in the last book) and muddles through a year. This wouldn’t be good as a stand alone book, but is a worthy continuation of the series. I have the next book and will leap into it right after this.