Books like The Green Slime
Susan Saunders, Edward Packard
The Green Slime is 52 pages, about 57 minutes at 250 words a minute.
12 books to read next
How long each takes
Northern Lights 7.5 h 
Oliver 1.2 h 
The Circus 1.0 h 
Masterminds 6.2 h 
Space And Beyond 2.2 h 
The Scorch Trials 7.0 h 
Five Go Off in a Caravan 3.5 h 
The Island of Time 2.1 h 
Journey Under The Sea 2.2 h 
The Cave of Time 2.1 h 
Escape 2.3 h 
Choose Your Own Adventure - The Brilliant Dr. Wogan 2.1 h Bar height shows length. Estimated at 250 words a minute.