This book was phenomenal. It's about three times as long as the books I normally read (~900 Kindle pages) so it took me awhile to finish. The multiple perspectives were done in a cohesive and easy to understand way. The monster was terrifying!!
Complaints, however: the last 10% of the book went in a weird direction. I felt like there should have been more buildup to this conclusion throughout the book, instead of just throwing in this lore and history at the end to tie it all together; it was a bit lazy. Without making spoilers, the way the information was related to the reader was also a shot out of the dark and could have been better nurtured in the story (rather than the fever dreams of withdrawal). The ending felt rushed, and there were some loose ends I wish the author had tied up. Also, I found myself skipping over some of the long sermons and lore stories.
Aside from those things, I will be buying this hardcover book for my bookshelf because it was a great historical fiction with a creepy, eerie monster and a punishing and terrifying environment.