Books like Amongst the Betrayed
Margaret Peterson Haddix
Amongst the Betrayed is 158 pages, about 2 hours 54 minutes at 250 words a minute.
6 books to read next
How long each takes
Supernova 10.2 h 
Please Ignore Vera Dietz 6.0 h 
The Ones Who Walk Away from Omelas 46 min 
The Power of Six 7.5 h 
Ship Breaker 6.2 h 
The Drowned Cities 8.0 h Bar height shows length. Estimated at 250 words a minute.