Books like How to Think About the Great Ideas
Mortimer J. Adler
How to Think About the Great Ideas is 530 pages, about 9 hours 43 minutes at 250 words a minute.
6 books to read next
How long each takes
A History of Western Philosophy 16.4 h 
Cosmos and Psyche 10.9 h 
The Passion of the Western Mind 10.0 h 
Voltaire's Bastards 11.7 h 
The Predicament of Culture 7.1 h 
The Educated Mind 5.6 h Bar height shows length. Estimated at 250 words a minute.