Books like Foundation and Empire
Isaac Asimov
Foundation and Empire is 253 pages, about 4 hours 38 minutes at 250 words a minute.
12 books to read next
How long each takes
Star Wars Trilogy 11.6 h 
Time Is the Simplest Thing 4.6 h 
The Mote in God's Eye 10.3 h 
Brightness Reef 11.8 h 
Dawn 4.7 h 
Look to Windward 6.8 h 
A Voyage to Arcturus 5.0 h 
Snow Crash 8.4 h 
A Fire Upon the Deep 11.1 h 
Heretics of Dune 9.8 h 
Stranger in a Strange Land 8.0 h 
God Emperor of Dune 8.3 h Bar height shows length. Estimated at 250 words a minute.