The Master Key System : Charles F. Haanel
The Master Key System is a personal development book by Charles F. Haanel that was published in 1912.
Though originally a 24 week correspondence course, it was published in book form in 1917. 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 several Masonic societies, 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.
Other books based on it
- Abundance and Prosperity – The Master Key System Decoded by Prof. C. W. Haanel Mentz ISBN 1-4257-1035-2
- The Master Key System in 24 Parts – Re-Edited by Anthony R. Michalski ISBN 0-9678514-0-8
- Master Key System (28 Part Complete Deluxe Edition) – Ishtar Publishing (July 2007) ISBN 978-0-9780535-8-1
