Think and Grow rich has been used by millions of business leaders around the world to create a concrete plan for success that, when followed, never fails.About the author: As a young special investigator for a national business magazine, Napoleon Hill was sent to interview Andrew Carnegie. During that interview, Carnegie slyly dropped a hint of a certain master power he used; a magic law of the human mind-a little known psychological principle that was amazing in its power. Carnegie suggested to Hill that on that principle he could build the philosophy of all personal success-whether it be measured in terms of Money, Power, Position, Prestige, Influence, or Accumulation of Wealth.