Book excerpt: This book focuses on rural-urban migrants in China. They are one of the most vulnerable and disadvantaged groups in the country but are essential to the country's industrialization and urbanization. Integration of these migrants into urban societies is an urgent issue facing Chinese policy makers. The book provides an updated, systematic, empirically rich, and multifaceted analysis of migrant integration, its determinants and consequences in China. It integrates insights from the perspective of sociology, population studies, social psychology, and public health to help us understand how and why migrants integrate, the role of migrant networks in social integration, and the relationship between integration of migrants and their mental health and settlement intentions.