Books like The Source Field Investigations
David Wilcock
The Source Field Investigations is 536 pages, about 9 hours 50 minutes at 250 words a minute.
8 books to read next
How long each takes
The Pleiadian Agenda 5.6 h 
The Myth of the Eternal Return 3.6 h 
Force 4.7 h 
The Magic of Reality 5.0 h 
Energy Ecstasy and Your Seven Vital Chakras 2.2 h 
Essential Energy Balancing 3.5 h 
Cosmic Energy 4.8 h 
A Brief History of Everything 6.2 h Bar height shows length. Estimated at 250 words a minute.