Simply put, it is the process of purchasing a product at a discounted rate and selling it to a customer base at a higher price which has a strong demand for the product. The difference between the purchased price and selling price is the profit on the transaction. There are some similarities to affiliate marketing to make money online, but what is important to realize is there is no inventory when it comes to arbitrage. This is what makes the Book Profits System so effective is it leverages arbitrage within Amazon. "Your garage and your spouse will thank you. :)" - Jon Shugart