Mary Buffett is the coauthor of Scribner's bestselling Buffettology series, a sought-after business speaker world-wide, and a contributor to HuffPost and the online magazine Thrive Global. Mary and Sean Seah recently launched the Buffett Online School (BuffettOnlineSchool.com), a monthly webinar sharing investment insights and helping 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, 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 foreign languages and are considered "investment classics" the world over. He has once again joined forces with Mary Buffett, and together they are writing Warren Buffett Investment Analysis, an in-depth investment manual for professional and aspiring investors.