Books like The Forbidden Door
Dean Koontz
The Forbidden Door is 480 pages, about 8 hours 48 minutes at 250 words a minute.
12 books to read next
How long each takes
The Big Bad Wolf 7.2 h 
Dark Matter 6.7 h 
The Collectors 9.1 h 
The Lost Symbol 11.1 h 
The Roses of May 5.9 h 
Unseen 8.1 h 
The Silent Wife 12.2 h 
Unsolved 8.6 h 
The Likeness 8.6 h 
Bad Monkeys 4.4 h 
True Courage 6.1 h 
Killing Floor 9.2 h Bar height shows length. Estimated at 250 words a minute.