This may be the best business book that describes the competitive advantages of profitable businesses. MOATS describes the nature of 70 selected businesses purchased by Buffett and Munger for Berkshire Hathaway Inc. MOATS is a very useful resource for investors, managers, students of business. Since its subject matter has proven success, MOATS may become a useful practical text in businesses schools around the world. MOATS also looks at the sustainability of these competitive advantages in each of the 70 chapters.