Og Mandino was a man who not only practiced what he preached but also inspired millions to follow his example of successful, fruitful living. The most widely read inspirational and self-help author in the world today, his nineteen previous books--including most recently The Spellbinder's Gift, The Twelfth Angel, and Secrets for Success and Happiness--have sold more than thirty-two million copies in twenty languages. The Greatest Mystery in the World is Og Mandino's final book.