Essays of Warren Buffett, 4th Edition Readers of Warren Buffett s letters to Berkshire Hathaway shareholders have gained an enormously valuable informal education in the art of investing. Broad in scope and long on wisdom Buffett s letters explain his principles on sound investing selecting managers valuing businesses using financial information profitably and other vital topics for investors. This newly updated Fourth Edition includes Buffett s latest wisdom on such topics as the financial crisis the housing bubble corporate governance Berkshire Hathaway s acquisition of Burlington Northern Santa Fe the role of oversight in heavily regulated industries today s best investing opportunities and the weaknesses of popular option valuation models.