Think and Grow Rich - 11 Page Pocket Summary of the Concepts and Philosophy of Dr. Napoleon Hill with Charles Haanel Master Key System Bonus Section

The research and writing of Think and Grow Rich lasted over 20 years. Ultimately Dr. Napoleon Hill sold over 30 million copies. As for his personal influences, he did write a letter to Charles F. Haanel to say that Haanel's Master Key System had much inspired him and changed his life.

Throughout his life, he spent a great deal of time teaching and helping others to learn the laws of success.