Social security fraud, economic crime, prostitution, money laundering, smuggling, and other illegal actions have one thing in common—they are all considered to be “shadow economy” activities. Such activities are increasing and require immediate attention from social and economic policy-makers and law-regulating authorities. Fredrich Schneider and Dominik H. Enste have made a commendable effort to highlight the causes, effects, and size of the underground economy in their new book.