Roger Lowenstein, author of the bestselling Buffett: The Making of an American Capitalist and When Genius Failed: The Rise and Fall of Long-term Capital Management, reported for the Wall Street Journal for more than a decade and wrote the Journal's stock market column "Heard on the Street" and also its "Intrinsic Value" column. He now contributes articles and reviews to the Journal and the New York Times Magazine and is a columnist for SmartMoney Magazine. He lives in Westfield, New Jersey.