Books like Free as in Freedom
Sam Williams
Free as in Freedom is 225 pages, about 4 hours 8 minutes at 250 words a minute.
12 books to read next
How long each takes
Free Software, Free Society 4.1 h 
Ghost in the Wires 7.6 h 
Neuromancer 5.8 h 
Coding Freedom 5.0 h 
The Hacker Ethic 4.4 h 
Hacking 7.0 h 
Social Engineering 5.9 h 
Hackers 8.4 h 
Hacking for Dummies 7.3 h 
The Girl Who Played with Fire 11.7 h 
Gray Hat Hacking 10.9 h 
The Art of Deception 6.6 h Bar height shows length. Estimated at 250 words a minute.