The man who wrote the best-selling self-help book in history, Think and Grow Rich, claimed the secret came from a private mentorship with Andrew Carnegie — but Carnegie's own meticulously kept visitor records show the two men never met.

The man who wrote the best-selling self-help book in history, Think and Grow Rich, claimed the secret came from a private mentorship with Andrew Carnegie — but Carnegie's own meticulously kept visitor records show the two men never met.

Andrew Carnegie’s household kept meticulous records of every visitor who walked through the door: names, dates, the length of each meeting. Generations of researchers have gone looking through those records for the young writer who claimed Carnegie handed him a twenty-year assignment and the secret to getting rich. His name never appears. Not once, in any entry, in any year, despite the story Napoleon Hill told for the rest of his life and built…