Middle books are hard, but made much easier when you read the trilogy like one giant book and don't really notice when one ends and the other begins.
This book basically tied up the loose ends from the previous book and created some new and interesting loose ends for the next book.
If you are at all invested in the world that Monette and Bear created, you will continue to very much enjoy this series. If you're not in it for the worldbuilding...okay, I guess, but I'm not entirely sure why you are here then.