Think and Grow Rich by Napoleon Hill

Based on interviews with some of the wealthiest figures of the early 20th century, Hill argues that wealth begins as a state of mind. Desire, faith, persistence, and clarity of purpose are presented as the invisible engines of success.
While often misinterpreted as magical thinking, the book’s deeper message is psychological: belief governs behavior, and behavior compounds into results. Hill explores fear, procrastination, and discipline as forces that either build or destroy fortunes.
Think and Grow Rich endures because it speaks to ambition itself — its dangers, its power, and its responsibility.