I finished this in one sitting! I think it will be a while before I approach a mushroom without thinking of this story. 
Paul Simard cleans hoarding houses for a living but in this story it will become clear why the biologist's house is his last one. 
I love books that mix proza with nature, so this book spoke to me on that level. But the human element about grief, hoarding and loneliness were aso really well done. The way this book mixes all those elements was really unique but also creepy. 

Thank you RA Busby for the ARC in exchange for an honest review.