Napoleon Hill (নেপোলিয়ন হিল born Oliver Napoleon Hill; October 26, 1883 – November 8, 1970) was an American self-help author. He is well known for his book Think and Grow Rich (1937) which is among the top 10 best selling self-help books of all time. Hill's works insisted that fervid expectations are essential to improving one's life. Most of his books were promoted as expounding principles to achieve "success".The acknowledgments in his 1928 multi-volume work The Law of Success, listed 45 of those he had studied, "the majority of these men at close range, in person", like those the book set was dedicated to, Andrew Carnegie, Henry Ford, and Edwin C. Barnes (an associate of Thomas Edison). Hill reported that Carnegie had given him a letter of introduction to Ford, whom Hill said had then introduced him to Alexander Graham Bell, Elmer R. Gates, Thomas Edison, and Luther Burbank.Hill openly described visits from spirits in Chapter 12 of his book, Grow Rich! With Peace of Mind (1967). He described them as unseen friends, unseen watchers, strange beings, and the Great School of Masters that had been watching over him, and who maintain a "school of wisdom". Hill states that the "Master" spoke to him audibly, revealing secret knowledge.