Books like The Practical Negotiator
I. William Zartman
The Practical Negotiator is 250 pages, about 4 hours 35 minutes at 250 words a minute.
6 books to read next
How long each takes
How Nations Negotiate 5.0 h 
Diplomacy 16.7 h 
Modern Diplomacy 8.4 h 
The Strategy of Conflict 5.7 h 
The Art and Science of Negotiation 7.0 h 
Force and Statecraft 5.6 h Bar height shows length. Estimated at 250 words a minute.