Books like The World Inside
Robert Silverberg
The World Inside is 188 pages, about 3 hours 27 minutes at 250 words a minute.
12 books to read next
How long each takes
The Caves of Steel 4.5 h 
Snow Crash 8.4 h 
The Naked Sun 4.2 h 
A Fire Upon the Deep 11.1 h 
The Robots of Dawn 8.2 h 
Cinder 7.8 h 
A Deepness in the Sky 14.5 h 
Foundation 4.4 h 
Beyond This Horizon 3.7 h 
The Number of the Beast 9.4 h 
Brave New World 4.4 h 
K-Pax 4.6 h Bar height shows length. Estimated at 250 words a minute.