The Politics of the Spirit is a masterful study of the political effects of evangelical Protestantism in Central America. Timothy Steigenga's thoughtfully crafted work questions whether the spread of Protestantism in Latin America has reinforced authoritarian elements in political culture or deepened nascent democracy. Steigenga provides a thorough review of the literature on religion and politics in Latin America, putting many of the hypotheses generated in this literature to the test through an analysis of comparative survey data and qualitative interviews. Steigenga investigates the impact religious affiliation has on political activity and belief, and the influence of cross-denominational religious beliefs and practices on Latin American life. His comparative work explores how different political systems—the established democracy of Costa Rica and the transitional system of Guatemala—impact the politics of religion. This enlightening interdisciplinary book will appeal to scholars seeking to understand the relationships between religious and political change in Latin America.