Brian Tracy, one of the top professional speakers and sales trainers in the world today, found that his most important breakthrough in selling was the discovery that it is the "Psychology of Selling" that is more important than the techniques and methods of selling.

The foundational and wildly popular go-to resource for influence and persuasion-a renowned international bestseller, with over 5 million copies sold-now revised adding: new research, new insights, new examples, and online applications. In the new edition of this highly acclaimed bestseller, Robert Cialdini-New York Times bestselling author of Pre-Suasion and the seminal expert in the fields of influence and persuasion-explains the psychology of why people say yes and how to apply these insigh...