This volume brings together a broad group of scholars from a diverse array of disciplines to write integratively about cutting-edge research issues pertinent to various facets of the study of early adolescence. All contributors speak to the idea of interdisciplinary integration as a means of advancing knowledge in particular focus areas of early adolescence; all approach their topic with an orientation to integrating levels of organization. In so doing, they testify to the importance of two interrelated integrations -- multidisciplinary and multiprofessional -- for furthering understanding of young adolescents.