Book excerpt: In System under Stress, The Challenge to 21st Century Democracy, Third Edition, Donald F. Kettl looks at the latest stress to hit the system—the financial crisis of 2008. In his brief, gripping narrative, Kettl assesses how well the U.S. political system responds under extraordinary pressure—from 9/11, to Hurricane Katrina, to the Great Recession— and asks if the government is ready to face that next challenge. A well-known scholar, commentator, and writer in the areas of federalism and governance, Kettl asks the hard questions, makes a credible and persuasive argument, and crafts a readable case study that is fascinating and thought-provoking.