Think and Grow Rich is a motivational book written by Napoleon Hill and inspired by a suggestion by Scottish-American billionaire Andrew Carnegie. It was published in 1937 during the Great Depression.[1] It remains the biggest seller of Napoleon Hill's books, selling a claimed 30 million copies over the next 70 years (although Alice Payne Hackett's 70 Years of Best Sellers suggests the figure was lower).The text of Think and Grow Rich! is founded on Hill's earlier work The Law of Success, the re