Books like The Case for Mars
Robert Zubrin
The Case for Mars is 348 pages, about 6 hours 23 minutes at 250 words a minute.
12 books to read next
How long each takes
Red Mars 10.9 h 
Foundation and Empire 4.6 h 
Second Foundation 4.4 h 
Look to Windward 6.8 h 
Blue Mars 14.4 h 
Mars 10.2 h 
Star Wars Trilogy 11.6 h 
Old Man’s War 5.7 h 
The Cosmic Connection 5.0 h 
A Voyage to Arcturus 5.0 h 
Dragonquest 6.1 h 
Revelation Space 10.3 h Bar height shows length. Estimated at 250 words a minute.