There is something really intresting about setting up a mistry in a fantasy book like this author does in all of the series. In this particular book we get to discover a brand new world with new characters while still seeing some of the characters we know and love from previous books. 
This is also true for the narrator, there are so many narrators! One of the first is Giddon and I honeslty didn't expect to like him that much, i always looked forward to his parts. I think his character arc flourishes in this installment and it's quite beautiful to see his sweetness. 
As always there is some romance, although it's not the main plot and there are more intresting elements to the book. For exaple Lovisa and her family

specially once everything has unfolded and we can see the inner struggle, the conflict with her own identity and how, eventually, she takes her power back

The only thing I would add is that I hope we can see more LGBTQ+ relationships between the main characters at some point in the future