Book excerpt: Which get out the vote efforts actually succeed in ethnoracial communities, and why? Analyzing the results from hundreds of original experiments, the authors of this book offer a persuasive new theory to explain why some methods work while others do not. Exploring and comparing a wide variety of efforts targeting ethnoracial voters, the authors present a new theoretical frame: the social cognition model of voting, based on an individual's sense of civic identity, for understanding get out the vote effectiveness. Their book serves as a guide for political practitioners, for it offers concrete strategies to employ in developing future mobilization efforts.