At the heart of a new regulatory craftsmanship, according to Sparrow, lies the central notion, "pick important problems and fix them." This beguilingly simple idea turns out to present enormously complex implementation challenges and carries with it profound consequences for the way regulators organize their work, manage their discretion, and report their performance. Although the book is primarily aimed at regulatory and law-enforcement practitioners, it will also be invaluable for legislators, overseers, and others who care about the nature and quality of regulatory practice, and who want to know what kind of performance to demand from regulators and how it might be delivered. It stresses the enormous benefit to society that might accrue from development of the risk-control art as a core professional skill for regulators.