People throw around the concept of GDP like it's an objective entity, but rarely do they peek under the hood and understand how and why it's calculated in a certain way and the implications of those very subjective, human choices. Coyle reviews this history nicely, pointing out that this metric is very much designed for a manufacturing-intensive world, that many parts of the economy are left out, and how challenging it is to come up with accurate, coherent metrics in an ever changing world. I only wish this book were longer. Highly recommend