Books like A History of Knowledge
Charles Lincoln Van Doren
A History of Knowledge is 447 pages, about 8 hours 12 minutes at 250 words a minute.
10 books to read next
How long each takes
The Advancement of Learning 4.5 h 
The Know-It-All 7.1 h 
The Postmodern Condition 2.2 h 
From Dawn to Decadence 16.4 h 
The Intellectual Devotional 6.9 h 
The Intellectual Devotional Modern Culture 6.9 h 
The Book of Trees 3.8 h 
Les Mots et les Choses 7.1 h 
The House of Wisdom 4.8 h 
Ideas 15.1 h Bar height shows length. Estimated at 250 words a minute.