2A dynamic authorial team of leading American politics scholars and a teachable Five Principles of Politics framework made American Government: Power and Purpose the gold standard in its field for more than 30 years. The Seventeenth Edition introduces the first new co-author in a decade, Hahrie Han (Johns Hopkins University), who brings a contemporary perspective on teaching American government and on the foundational collective action principle interwoven throughout the text. Together with InQuizitive, Norton's online learning tool, and the new Norton Illumine Ebook, American Government engages students in applying the Five Principles framework to American politics. In the process, they learn to think critically about course concepts and understand how contemporary scholarship shapes our understanding of American government, past and present.