TL;DR if you skip this you want miss anything.
While it’s still enjoyable to listen, absolutely nothing happened the whole book, with exception of the last 30 minutes. This could have been chapter 1 of the next book.
Incredibly mild spoilers:
I also didn’t like how contrived the meeting of Nora and Delvers was and i don’t think they really work well together. I would have far more preferred if the 2 series remained separate, as there is basically no chemistry between Nora and the others.
This is basically 70% zero stakes training, 20% fight against a monster that doesn’t really matter. A wrap up of one of the villains that were already defeated, but needed to show up for some reason and 5% sequel hook that goes back to interesting territory.