Business journalist and New York Times editorial writer Porter delivers a popular explication of how supply and demand affect prices. In vignettes about all manner of transactions, from coffee sales to marriage dowries to home values, he disputes notions that prices settle out as rational correlations of supply and demand. All sorts of emotional factors are involved, which enliven Porter#s stories as he explores divergent behaviors of upper-, middle-, and lower-income consumers in what they will pay for something. If a purchase expresses the pursuit of happiness, Porter chases the idea that money yields joy, concluding it can, though temporarily. What about the price of power? Porter adduces the cost of votes in São Tomé v. the United States, as he does the worth of labor, love, and life itself, practically breaking them down into a schedule of prices.