Napoleon Hill is one of the world's most influential authors in the field of personal development and success. His book "Who Thinks Gets Rich" is a classic that has sold more than 30 million copies worldwide. In the book "Smarter Than the Devil," Hill shares his philosophy of success, which is based on 17 principles he learned from the greatest businessmen and leaders of his time. In this ebook, we will examine Napoleon Hill's method in detail. We will also compare this method with other methods of personal development and success, such as neurolinguistic programming (NLP), the law of attraction, and coaching.