3 books
George J. Thompson, PhD, was an English professor and a black belt master of karate. He created and crash-tested verbal judo when he was a police officer on an urban beat.
Verbal Judo, Updated Edition
The Verbal Judo Way of Leadership
Hammett's Moral Vision: The Most Influential In-Depth Analysis of Dashiell Hammett's Novels Red Harvest, the Dain Curse, the Maltese Falcon, the Glass Key, and the Thin Man