Books like The Ugly Little Boy
Isaac Asimov, Robert Silverberg
The Ugly Little Boy is 352 pages, about 6 hours 27 minutes at 250 words a minute.
12 books to read next
How long each takes
Matahari 7.3 h 
The Inheritors 4.3 h 
Time and Again 7.3 h 
Before the Coffee Gets Cold 4.4 h 
The Invisible Man 3.1 h 
Kindred 5.3 h 
Love Just in Time 8.6 h 
Humans 7.0 h 
This Is How You Lose the Time War 3.8 h 
Station Eleven 6.5 h 
One Last Stop 7.9 h 
Hybrids 7.3 h Bar height shows length. Estimated at 250 words a minute.