Books like The Key to the Tarot
Arthur Edward Waite
The Key to the Tarot is 170 pages, about 3 hours 7 minutes at 250 words a minute.
7 books to read next
How long each takes
Tarot for Your Self 5.6 h 
Kitchen Table Tarot 5.2 h 
Holistic Tarot 16.0 h 
The Tarot of the Bohemians 6.5 h 
Gnostic Tarot 6.6 h 
Tarot for Beginners 6.8 h 
How to Read the Tarot 4.8 h Bar height shows length. Estimated at 250 words a minute.