This is the Best-Selling Success Book of All Time and the Secret to Your Network Marketing Business. Over 60,000,000 Copies Have Been Sold. In 1883, Napoleon Hill was born into poverty. In 1910, while working as a reporter, he was assigned to interview billionaire industrialist, Andrew Carnegie. During this interview, Carnegie gave hints about the 'secret' he had used to attain wealth. Carnegie believed the process of success was a simple formula which could be duplicated by the average person.