Books like Mycelium Running
Paul Stamets
Mycelium Running is 350 pages, about 6 hours 25 minutes at 250 words a minute.
8 books to read next
How long each takes
Mushrooms 5.6 h 
The Fifth Kingdom 7.1 h 
Magical Mushrooms, Mischievous Molds 4.8 h 
The Audubon Society Field Guide to North American Mushrooms 17.0 h 
1493 10.3 h 
Environmental Science 12.5 h 
The Biology of Fungi 2.7 h 
Limits to Growth 3.8 h Bar height shows length. Estimated at 250 words a minute.