Books like The Vertical Plane
Ken Webster
The Vertical Plane is 352 pages, about 6 hours 27 minutes at 250 words a minute.
8 books to read next
How long each takes
Between Death and Life 4.6 h 
Satan Is Alive and Well on Planet Earth 4.7 h 
The Other Side and Back 5.1 h 
Begone Godmen! 3.7 h 
The Future of the Body 14.4 h 
Visits from the Afterlife 5.3 h 
The Unknown Reality Volume-I 14.9 h 
The Law of Psychic Phenomena 7.5 h Bar height shows length. Estimated at 250 words a minute.