This was another really good horror book! The plot reminded me a lot of What Moves the Dead with a mushroom species taking over the human body and such. It's such a fascinating idea. 
I really liked the main character, Vern. She was so self-sufficient and knew how to survive right from the start even though she grew up with everything she ever needed. It does seem a little far-fetched that she just knew how to shoot, kill, clean, and cook game as well as build shelters and everything else she would need to know in order to survive on her own in the woods for years, but it didn't bother me while I was reading. She was still really impressive especially with how she just rolled with the punches as her body began to change with the fungus infection. I would definitely have freaked out, but you could tell that was not Vern's style.
I also loved the representation in this book. Vern was born intersex and identifies as a woman and her love interest is two-spirit. Not to mention that Vern is basically blind with her vision being so bad. It's always great to see different people represented in literature. 
I will say that I didn't completely understand the whole government and Cainland thing and how Ollie combined with that as well. It was a little confusing for me, but I feel like I might have missed a couple things while listening at work, so if I ever read it physically, that might be cleared up.
Speaking of the audiobook, the narrator was fantastic. The writing was beautiful and the narrator's voice fit it so well. I loved the whole experience.
Overall, a great horror book and probably a good one for anyone who enjoys T. Kingfisher's horror books as well.