Political science and policy scholars from the US offer 15 essays on the role and impact of interest groups in US politics. They discuss organized labor, the LGBT movement, religious lobbying, congressional campaigns, corporate lobbyists, ethnic interest groups and foreign policy lobbying, invisible lobbying and special district politics, negative lobbying, intergovernmental lobbying, the Tea Party, the tobacco industry, the role of “dark money” in campaign funding, the profession of lobbying, and advocacy and inequality. Annotation ©2015 Ringgold, Inc., Portland, OR (protoview.com)