Books like The Guide to Pyramid Energy
Bill Kerrell
The Guide to Pyramid Energy is 154 pages, about 2 hours 49 minutes at 250 words a minute.
6 books to read next
How long each takes
Frequency 5.6 h 
The Secret Power of Pyramids 4.1 h 
Essential Energy Balancing 3.5 h 
Secrets from Beyond the Pyramids 4.2 h 
Secrets of the Great Pyramid 7.6 h 
Kabbalistic Alchemical, and Occult Symbolism of the Great Pyramid 52 min Bar height shows length. Estimated at 250 words a minute.