Over the last half century, two major developments have transformed the nature of workers' rights and altered the pathways available to low-wage workers to combat their exploitation. First, while national labor law, which regulates unionization and collective bargaining, has grown increasingly ineffective, employment laws establishing minimal workplace standards have proliferated at the state and local levels. Second, as labor unions have declined, a diversity of small, under-resourced nonprofit "alt-labor" groups have emerged in locations across the United States to organize and support marginalized workers. In Alt-Labor and the New Politics of Workers' Rights, political scientist Daniel J. Galvin draws on rich data and extensive interviews to examine the links between these developments. With nuance and insight, Galvin explains how alt-labor groups are finding creative ways to help their members while navigating the many organizational challenges and structural constraints they face in this new context. Alt-labor groups have long offered their members services and organizing opportunities to contest their unfair treatment on the job. But many groups have grown frustrated by the limited impact of these traditional strategies and have turned to public policy to scale up their work. They have successfully led campaigns to combat wage theft, raise the minimum wage, improve working conditions, strengthen immigrants' rights, and more. These successes present something of a puzzle: relative to their larger, wealthier, and better-connected opponents, alt-labor groups are small, poor, and weak. Their members are primarily low-wage immigrant workers and workers of color who are often socially, economically, and politically marginalized. With few exceptions, the groups lack large dues-paying memberships and are dependent on philanthropic foundations and other unpredictable sources of funding. How, given their myriad challenges, have alt-labor groups managed to make gains for their members? Galvin reveals that alt-labor groups are leveraging their deep roots in local communities, their unique position in the labor movement, and the flexibility of their organizational forms to build their collective power and extend their reach. A growing number of groups have also become more politically engaged and have set out to alter their political environments by cultivating more engaged citizens, influencing candidate selection processes, and expanding government capacities.