In the last 30 years -- aside from Presidents and Popes -- no individual has touched more lives than Og Mandino. He is a multi-best-selling author, whose inspirational books have sold 36,000,000 copies. Now, you will learn how to put into action the ten ancient scrolls from "The Greatest Salesman in the World". "The Greatest Secret in the World" helps you to chart your daily progress and to discover the enduring life-changing secrets of success. This wonderful story will help you to understand the meaning of the "greatest secret".