Oliver Napoleon Hill  was an American self-help author. He is best known for his book Think and Grow Rich (1937), which is among the best-selling self-help books of all time.[1][2] Hill's works insisted that fervid expectations are essential to improving one's life.[3][4] Most of his books are promoted as expounding principles to achieve "success".Hill is a controversial figure. Accused of fraud, historians also doubt many of his claims, such as that he met