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 internationally bestselling books, The Tao of Charlie Munger and those co-authored with Mary Buffett – including Buffettology, The New Buffettology, Warren Buffett and the Interpretation of Financial Statements, Warren Buffett's Management Secrets, 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.