Augustine 'Og' Mandino II was an American author who wrote inspirational and self-help books. He was born on December 12, 1923, in Framingham, Massachusetts, and died on September 3, 1996, in Antrim, New Hampshire, at the age of 72. Mandino's most famous book is The Greatest Salesman in the World, which has sold over 50 million copies and has been translated into over 25 languages.