Og Mandino

Og Mandino (1923–1996) was an American author, speaker, and president of Success Unlimited magazine. Overcoming severe personal adversity and alcoholism, he transformed his life through the study of philosophy and salesmanship.

He is best known as the author of the inspirational classic The Greatest Salesman in the World, which has sold tens of millions of copies worldwide and introduced timeless parables on perseverance and positive thinking.

Mandino’s uplifting allegories and moral philosophy laid foundational stones for the modern motivational speaking and self-help industry. His legacy endures globally.