Cool fantasy/horror riff on The Fall of the House of Usher (which I haven't read), now with more mushrooms. In terms of gothic horror with fungus, I think this one overall worked better for me than Mexican Gothic, but I'm not sure it's a subgenre I'm in love with.

I did like the main character, a Ruritanian war veratrine, whose gender was "soldier" because of some historical and linguistic quirks with their culture. I also liked the English Lady of a Certain Age mycologist. And the horse. That's kinda all I got? It was fine. There were some good creepy bits? I'll probably read the sequel because it has mostly the same characters.