A Lifetime of Study Condensed and Clarified In 1908, Andrew Carnegie challenged Hill to discover and publish the practical Philosophy of Achievement that Carnegie knew existed, but had never been assembled. Published in 1928, Law of Success distilled Hill's interviews with over 500 "movers and shakers" of his day into a 16-volume course that became an overnight bestseller. It was published almost exactly 20 years after that Carnegie interview. In 1937, he revised that original massive work into a single volume, Think and Grow Rich, edited into the language of that day. Its purpose was to help the nation heal after the Depression and shake off the Fear of Poverty. After eight years, Hill again revised and simplified that philosophy. He studied and edited based on reader input, plus his own life experiences to come out with the sequel, The Master Key to Riches, in 1945. Take Think and Grow Rich to a new level with Hill's sequel. Get Your Copy Now.