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2014 Reprint of 1919 Edition. Abridged Edition. "The Master Key System" is a personal development book by Charles F. Haanel (1866-1949) that was originally published as a 24-week correspondence course in 1912. It was later published in book form in 1916 by Psychology Publishing, St. Louis and The Master Key Institute, New York. The course is a practical guide to the seven hermetic principles as laid out in the "Kybalion." Each chapter contains a sequentially numbered section to read. Along with "The Science of Getting Rich," by Wallace D. Wattles, the "Master Key System" is the source of Rhonda Byrne's inspiration for the book and the film "The Secret" (2006). Charles F. Haanel was an American author, millionaire, entrepreneur, and businessman who belonged to the Masonic society, Keystone Lodge No. 243, A.F. & A.M., the American Scientific League, The Author's League of America, The American Society of Psychical Research, the St. Louis Humane Society, and the St. Louis Chamber of Commerce. Our edition includes all 24 lessons in their entirely, but does not reprint the study questions.
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