Books like Getting Things Done
David Allen
Getting Things Done is 279 pages, about 5 hours 7 minutes at 250 words a minute.
10 books to read next
How long each takes
Competing Against Time 5.2 h 
The Productivity Project 5.6 h 
No Excuses! 5.6 h 
The Now Habit 4.0 h 
First Things First 7.0 h 
Becoming Your Own Emotional Support System 3.9 h 
Hyperfocus 4.7 h 
The Management of Time 3.2 h 
15 Secrets Successful People Know About Time Management 3.6 h 
Work Clean 5.5 h Bar height shows length. Estimated at 250 words a minute.