El Vendedor Mas Grande del Mundo = The Greatest Salesman in the World

A guide to a philosophy of salesmanship, and success by telling the story of Hafid, a poor camel boy who achieves a life of abundance. While his messages did have Christian undertones (by referring to Paul as the greatest salesman in the world), it was still a message of repetitive actions to build good habits. Over 50 million copies sold world wide.