This volume presents cutting-edge research on integration and adaptation processes of second-generation immigrant adolescents in Spain that no doubt constitutes an important and timely contribution to the migration-integration debate. Principal findings of the Investigación Longitudinal de la Segunda Generación study indicate a comparatively smooth integration of second-generation immigrant adolescents, arguably best explained by the theoretical hypotheses of neo-assimilationism and segmented assimilation. The major strengths of the study pertain to research design and methodology, and theoretical grounding that enables it to have far-reaching implications for future research on migrant youth in Spain and beyond. The focus here is primarily on questions of transferability of major findings to other European countries, such as Sweden. In essence, the authors’ findings raise a number of important questions regarding the feasibility (or infeasibility) of Spain’s laissez-a-faire approach to integration in countries with contrasting modes of incorporation.