The Master Key System

“Unlock your full potential with The Master Key System. You can attain more wealth, more power, more health, and ultimately more happiness simply by following the truths laid out in this short but valuable classic. With the help of the Father of Personal Development, Charles F. Haanel, discover the Cosmic intelligence and become self-empowered”–Back cover

The Master Key System is a personal development book that was originally published as a correspondence course in 1912. 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”.