The Master Key sets out the fundamental principles of life and conscious, rightful living. Basic to his teaching is the correct development and use of mental power -- the key to truly creative power and action, harmony and health, love and happiness, and abundant possibilities.

Charles Haanel's numbered common-sense messages still have a freshness almost one hundred years after they were first assembled.

It was Napoleon Hill, author of "Think and Grow Rich", who thanked Charles Haanel in a personal letter for publishing the Master Key System, as Hill deemed it invaluable in achieving his own personal success. That alone speaks volumes.