Books like The Illustrated World's Religions
Huston Smith
The Illustrated World's Religions is 256 pages, about 4 hours 42 minutes at 250 words a minute.
7 books to read next
How long each takes
The Physiological Basis of Medical Practice 28.5 h 
Greek Religion 9.2 h 
The Religious Experience of Mankind 10.9 h 
A History of Religious Ideas 11.3 h 
World Religions Today 10.3 h 
The Meaning and End of Religion 6.2 h 
World Religions 10.2 h Bar height shows length. Estimated at 250 words a minute.