usinessman, psychical investigator, and bestselling author Charles Brialinspired countless Americans to use "Mental Power" as a means of attaining success. The pinnacle of his thought appeared in The Master Key System, one of the earliest and finest works to explore the "Law of Attraction." The Master Key System is made up of twenty-four chapters-each composed of short, numbered aphorisms and instructions-to teach you, in a very direct, step-by-step manner, how to unlock the success-power of your mind. Part of the book's appeal is that it can be read all the way through as a comprehensive lesson plan, or readers can dip in at random, flipping to any of its pages for brief, practical advice on how to thrive in the world. Haanel's insights resound with both a tough-minded business sense and a keen understanding of the higher principles that shape our lives.