Revealed preference approaches to non market valuation of recreation, environmental quality and health have been widely accepted by economists for decades. However, often the empirical methods preceded the theory, leading to concerns about whether these empiricalmethods really delivered legitimatemeasures of economicwelfare. In this book, Bockstael and McConnell concisely synthesize the economic principles that must be followed for revealed preference methods to yield valid welfare measures. Their book guides the applied economist through the subtleties of consumer demand theory applied to quality changes that must be adhered to in empirical work in order for the resulting benefit measures to have the intended tie to utility. In this sense, reading this book is a reminder to many of us (the reviewer included) of what we learned in our Ph.D. program and sometimes forget as we undertake our latest empirical study. This book by Bockstael and McConnell provides the theoretical complement to Ted McConnell’s earlier book with TimHaab on the econometrics of non market valuation (Haab and McConnell 2002). Taken together these two books provide superb guides to the theory and practice of revealed preference methods. While excellent edited books on revealed preference methods exist, nothing can quite replace a book written by two authors who maintain consistency in nomenclature, equations, etc., that makes it easier for the reader to understand the concepts and methods without being befuddled by notational differences across chapters. The book takes the reader on a tour of welfare economics, comparing and contrasting the ease of evaluating price changes to the challenges faced in evaluating the benefits of quality changes. The theory is then applied to discrete choice models, hedonic property models, hedonic wage models and public goods as an input to household and firms’ production functions. Bockstael and McConnell spend two chapters guiding the reader through one of the key challenges of deriving valid welfare measures from many revealed preference methods: the necessary assumption of weak complementarity. They explore the necessity of imposing this restriction on preferences, what it implies for estimating Marshallian demands, and that