Books like The High Frontier
Gerard K. O'Neill
The High Frontier is 288 pages, about 5 hours 17 minutes at 250 words a minute.
7 books to read next
How long each takes
Sea of Tranquility 5.0 h 
The Galaxy, and the Ground Within 7.3 h 
Shadows in Flight 4.1 h 
Poems by John Keats 6.2 h 
Mooncop 1.8 h 
Freedom's Ransom 5.7 h 
Farmer in the Sky 4.1 h Bar height shows length. Estimated at 250 words a minute.