Books like A Ladder to the Sky
John Boyne
A Ladder to the Sky is 400 pages, about 7 hours 20 minutes at 250 words a minute.
12 books to read next
How long each takes
Kill Your Darlings 5.4 h 
Oracle Night 4.6 h 
The Door 5.0 h 
The Counterlife 6.0 h 
The Memory Police 5.3 h 
Of Mice and Men 2.2 h 
Boyhood Island 8.5 h 
1Q84 17.0 h 
The God of Small Things 6.6 h 
Liam's Secret Son 3.5 h 
The Plague 5.1 h 
The Goldfinch 15.8 h Bar height shows length. Estimated at 250 words a minute.