Books like The Unseen
Heather Graham
The Unseen is 352 pages, about 6 hours 27 minutes at 250 words a minute.
12 books to read next
How long each takes
In the Woods 10.6 h 
The Brass Verdict 9.8 h 
Rough Country 7.1 h 
Rule 34 6.5 h 
City of Bones 7.3 h 
Crooked House 4.1 h 
Mary, Mary 7.6 h 
The Leavenworth Case 5.6 h 
Immortal in Death 6.2 h 
Honeymoon 7.2 h 
Glory in Death 5.7 h 
One, Two, Buckle My Shoe 3.9 h Bar height shows length. Estimated at 250 words a minute.