Books like A Theory of Cognitive Dissonance
Leon Festinger
A Theory of Cognitive Dissonance is 291 pages, about 5 hours 20 minutes at 250 words a minute.
8 books to read next
How long each takes
Adapt 5.9 h 
Thinking, Fast and Slow 9.7 h 
Social Foundations of Thought and Action 10.0 h 
The Art of Thinking Clearly 7.0 h 
Adaptation-level Theory 13.4 h 
Super Thinking 6.5 h 
Gut Feelings 5.3 h 
Die Kunst des Klaren Denkens 4.5 h Bar height shows length. Estimated at 250 words a minute.