Augustine "Og" Mandino (December 12, 1923 – September 3, 1996) was a "sales guru" and the author of the bestselling book The Greatest Salesman in the World. He remains one of the most inspirational and best-selling authors today. His books have sold over 50 million copies and have been translated into over twenty-five different languages. He was the president of Success Unlimited magazine until 1976. He had been inducted into the National Speakers Association's Hall Of Fame.
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