The original Master Key System contained 24 parts or modules of study. According to Stevens, writing in 1909, 'He was president of the Continental Commercial Company, president of the Sacramento Valley Improvement Company, and president of the Mexico Gold & Silver Mining Company.' Haanel practiced the financial principles he preached and was a self made success who owned several major companies. By 1933 it had sold over 200,000 copies worldwide. The book was heavily promoted in the pages of Elizabeth Towne's New Thought magazine The Nautilus.
It is written in the form of a course in New Thought, mental development, financial success, and personal health. Hannel's book The Master Key System, was published in 1912, when he was 46 years old. He is best known for his contributions to the New Thought Movement through his book The Master Key System. Charles Francis Haanel was a noted American New Thought author and a businessman.
