The Master Key System was among the first books to use the phrase Law of Attraction, which has become such a popular term in todays language when referring to the most powerful force in the universe. Covering everything from how to create abundance, wealth to how to get healthy with an assignment for each week. With precision, this book elucidates on each topic with logic and rigor that not only leaves you feeling good, it also has you thinking good. Thanks to the original author Charles Haanel and his core beliefs that built this lesson plan, his book was also one of the major inspirations behind the hit movie known as "The Secret" and is now known to have inspired the writing of the world's most famous success book Think And Grow Rich.