Books like The Treatment
Mo Hayder
The Treatment is 450 pages, about 8 hours 15 minutes at 250 words a minute.
12 books to read next
How long each takes
Hawksmoor 4.1 h 
Towards Zero 4.1 h 
Kiss the Girls 8.5 h 
Jack & Jill 7.9 h 
In the Woods 10.6 h 
In Pursuit of the Proper Sinner 13.2 h 
Guilty as Sin 11.1 h 
Tick Tock 7.1 h 
Crime 6.3 h 
Cross Country 7.3 h 
Murder List 8.1 h 
Killing Floor 9.2 h Bar height shows length. Estimated at 250 words a minute.