Books like The White Mountains
John Christopher
The White Mountains is 176 pages, about 3 hours 14 minutes at 250 words a minute.
12 books to read next
How long each takes
The Infinite Sea 6.2 h 
The Dangerous Days of Daniel X 5.0 h 
Uglies 7.9 h 
The Rise of Nine I Am Number Four 6.6 h 
Four 4.8 h 
Extras 7.7 h 
The Power of Six 7.5 h 
The Perks of Being a Wallflower 4.2 h 
The Rise of Nine 1.3 h 
Lilo & Stitch 1.7 h 
The Giver 3.7 h 
Among the Free 3.7 h Bar height shows length. Estimated at 250 words a minute.