Think and Grow Rich 70 million

Featuring one of only two American authors in the top ten the other is #9, Think and Grow Rich was a selfimprovement book written by Napoleon Hill in 1937. Asked to look at the relationship between individual characteristics and wealth attainment by steel giant Andrew Carnegie, Hill embodied his 13 principles of personal achievement into the book, a hotcake as countries were beginning to emerge from the Great Depression.