Mary Buffett is the coauthor of Scribner’s bestselling Buffettology series, and a contributor to HuffPost and the online magazine Thrive Global. Mary’s online school—BuffettOnlineSchool.com—provides monthly investment insights and helps students learn to build successful stock portfolios.

For over twenty years, David Clark has been considered the world’s leading authority on the subject of Warren Buffett’s investment methods. His international bestselling investment books, The Tao of Charlie Munger and those coauthored with Mary Buffett—Buffettology, The Buffettology Workbook, The New Buffettology, The Tao of Warren Buffett, Warren Buffett and the Interpretation of Financial Statements, The Management Secrets of Warren Buffett, Warren Buffett and The Art of Stock Arbitrage, and The Warren Buffett Stock Portfolio—have been translated into more than twenty languages and are considered “investment classics” the world over.