Robert Cialdini’s original book is a must-read if your goal is understanding how people make decisions and build relationships with others. His methods have helped me in everything from sales and marketing, to managing employees, to ultimately getting to a yes in my professional life when I need it the most.
Cialdini has written several books that expand on the six methods. Start with Influence, and if you like this one, read Yes! 50 Scientifically Proven Ways to be Persuasive and Pre-Suasion: A Revolutionary Way to Influence and Persuade