Think and Grow Rich reveals 13 powerful principles for achieving wealth and success. Based on 25 years of research and interviews with over 500 wealthy individuals, Napoleon Hill shows how thinking like the rich can lead to financial success. His timeless principles include Faith, Autosuggestion, and Decision. Backed by decades of success stories, this updated edition features examples from modern achievers like Bill Gates and Steven Spielberg, proving the relevance of Hill’s formula today.