The craziest thing about Think and Grow Rich is the author being a career con artist who abandoned his family and died broke. An entire genre of literature and industry was inspired by a genuine fraud, and fakes still thrive in it.
https://paleofuture.gizmodo.com/the-untold-story-of-napoleon-hill-the-greatest-self-he-1789385645">https://paleofuture.gizmodo.com/the-untol...