Books like Attack of the Mutant
R. L. Stine
Attack of the Mutant is 119 pages, about 2 hours 11 minutes at 250 words a minute.
12 books to read next
How long each takes
Avatar 1.7 h 
The Lost Days 2.6 h 
The Earth Kingdom Chronicles 1.8 h 
The Ruins of Gorlan 4.8 h 
The Lost Scrolls 1.2 h 
Renegades 10.7 h 
Batman 2.4 h 
The Book Of Three 4.0 h 
The Dark Knight Returns 3.6 h 
The Burning Bridge 5.1 h 
Emily The Strange #1 53 min 
Astro Boy 3.8 h Bar height shows length. Estimated at 250 words a minute.