The book is a collection of 17 lectures that Hill gave in Chicago in the mid-1950s. The lectures cover a wide range of topics related to success, including goal setting, positive thinking, and the power of the subconscious mind. Hill's Master Course is based on his research into the lives of successful people. He interviewed over 500 of the most successful people in the world, including Andrew Carnegie, Henry Ford, and Thomas Edison. Hill found that all of these successful people shared certain common traits, such as a burning desire to succeed, a positive mental attitude, and the ability to take action. In his Master Course, Hill teaches readers how to develop these same traits and achieve their own success. He provides a step-by-step plan that covers everything from setting goals to overcoming obstacles. Hill's Master Course is a comprehensive and practical guide to success that has helped millions of people achieve their dreams.