The Art of Negotiation in Diplomacy by Lewis Pulsipher
Chainsaw Diplomacy by Paul D. Winsor 
Eye of the Eagle or The Goal’s The Thing!! by Brian Cannon
The Good Ally by Ken Lakofka
How To Lie To Your Opponents by Hanz Johnsson
It’s All Kathy Caruso’s Fault by Harry Cameron Andruschak
Psychoanalyse Your Opponents by Andrew Feather
Psychology and Diplomacy: Using Integrative Complexity to Predict Stabs
by Brahm O. Dorst
A Psychological Analysis by Chris Aanstoos
Preventing the Stab! by Tom Hurst