There has been a huge surge in writing about happiness and law. Part of the rationale for the interest in happiness is that it is a potential substitute for conventional notions of efficiency. Every conventional efficiency-oriented standard is based on expectations that one will be better off. For example, demand is based on willingness to pay but not on the outcome of the actual purchase. Happiness, on the other hand, is about how things turn out. Indeed, the importance of a topic is evident when two well-published and eminent law professors present a book of readings on the topic. Law and Happiness, edited by Eric Posner and Cass Sunstein, is such a book. It is evidence that even the most serious people regard the law/happiness relationship as something to examine closely. What the collection suggests is that there is work to be done. Happiness standards need to be refined and the issue of whether happiness is all that matters requires close examination.