Behind the walls of a church, Liliana and her baby eat, sleep, and wait. Outside, protestors shout ''Go back to Mexico!'' and ''Tax this political church!'' They demand that the U.S. government deport Liliana, which would separate her from her husband and children. Is Liliana a criminal or a hero? And why does the church protect her?

Grace Yukich draws on extensive field observation and interviews to reveal how immigration is changing religious activism in the U.S. In the face of nationwide immigration raids and public hostility toward ''illegal'' immigration, the New Sanctuary Movement emerged in 2007 as a religious force seeking to humanize the image of undocumented immigrants like Liliana. Building coalitions between religious and ethnic groups that had rarely worked together in the past, activists revived and adapted ''sanctuary,'' the tradition of providing shelter for fugitives in houses of worship. Through sanctuary, they called on Americans to support legislation that would keep immigrant families together. But they sought more than political change: they also pursued religious transformation, challenging the religious nationalism in America's faith communities by portraying undocumented immigrants as fellow children of God.

Yukich shows progressive religious activists struggling with the competing goals of newly diverse coalitions, fighting to expand the meaning of ''family values'' in a globalizing nation. Through these struggles, the activists both challenged the public dominance of the religious right and created conflicts that could doom their chances of impacting immigration reform.