Books like The Four Major Cults
Anthony A. Hoekema
The Four Major Cults is 447 pages, about 8 hours 12 minutes at 250 words a minute.
7 books to read next
How long each takes
Crisis of Conscience 8.0 h 
Mankind's Search for God 7.0 h 
Apocalypse Delayed 7.9 h 
The Kingdom of the Cults 8.1 h 
'Let Your Name Be Sanctified' 7.0 h 
You Can Live Forever in Paradise on Earth. 4.7 h 
In Search of Christian Freedom 13.8 h Bar height shows length. Estimated at 250 words a minute.