Books like The Tunnel Thru the Air
William D. Gann
The Tunnel Thru the Air is 323 pages, about 5 hours 55 minutes at 250 words a minute.
9 books to read next
How long each takes
The Moon Is a Harsh Mistress 6.1 h 
The Long Mars 7.8 h 
Children of the Mind 7.0 h 
First Lensman 5.6 h 
Oath of Fealty 6.0 h 
The Big Time 2.4 h 
Saint Camber 8.4 h 
Star Wars - Legacy of the Force - Invincible 6.2 h 
School of Fire 6.5 h Bar height shows length. Estimated at 250 words a minute.