This started good but got better and better with a few great twists towards the end (and all wholesome even though it is a dark book). There was a lot of anticipation and suspense throughout the book. Times when I was heartbroken and “wanted to look away” or stop listening, since I read this on audiobook. 
I liked Griz and the dogs, I liked how things tied together and how there was some breaking of the fourth wall / commentary 
The book is emotional and dark yet also hopeful and a refute of nihilistic views towards the end of the world. 
Would oddly compare it a bit to Fredrick Backman books even though this has more danger & death. Both write about humanity, morality, purpose & meaning, love/family/relationships, bonds with animals, ethics, religion, imagination/stories.