This volume provides a vivid portrait of a transnational migrant community anchored in both the remote Mixteca region of Oaxaca and the San Diego metropolitan area.Drawing on surveys and interviews with migrants and potential migrants conducted by a binational research team in 2007-2008, the contributors show how the Oaxaca-based and the California-based natives of the town of San Miguel Tlacotepec have built parallel communities separated by an increasingly fortified international border. Their findings shed important new light on a range of vital issues in US immigration policy, including the efficacy and impact of border enforcement, how undocumented status affects health and education outcomes, and how modern telecommunications are shaping transborder migrant networks.This vivid portrait of a transnational migrant community sheds important new light on a range of vital issues in US immigration policy.