Although the market is widely regarded as the best way of organizing complex modern economies, many who take this view also believe that certain limits should be placed on its range of application. Despite its many virtues, there are some things that should not be provided through the market, or whose sale and purchase is morally problematic. But on what basis can and should such judgements be made? Debra Satz, in this important and illuminating book, provides us with a philosophical theory that specifies the relevant considerations in making these judgements, and hence in determining the proper limits of the market.