Books like Introductory Mycology
Constantine John Alexopoulos
Introductory Mycology is 613 pages, about 11 hours 14 minutes at 250 words a minute.
6 books to read next
How long each takes
The Fifth Kingdom 7.1 h 
Fundamentals of the Fungi 10.4 h 
Entangled Life 6.8 h 
The Biology of Fungi 2.7 h 
Ainsworth & Bisby's Dictionary of the Fungi 11.7 h 
Atlas of Clinical Fungi 21.0 h Bar height shows length. Estimated at 250 words a minute.