Books like The Assassin and the Underworld
Sarah J. Maas
The Assassin and the Underworld is 53 pages, about 58 minutes at 250 words a minute.
12 books to read next
How long each takes
Fourth Wing 9.5 h 
Red Rising 8.1 h Sunrise on the Reaping 7.3 h 
Brutal Prince 5.6 h 
Midnight Sun 12.4 h 
If You Could See the Sun 6.5 h 
Eldest 12.9 h 
The Ballad of Never After 7.6 h 
Lightlark 7.9 h 
The Testaments 8.7 h 
Flashback 15.6 h 
Inheritance 15.3 h Bar height shows length. Estimated at 250 words a minute.