Applying the constructive knowledge gained from behavioral and social research to public health represents a promising new direction. The au thors in this volume provide insight on that promise by discussing mob ilization, prevention programs, intervention evaluations, and research . Not only a showcase of successful integration, this volume is also a challenge to public health specialists and behavioral and social scie ntists to integrate their work in more effective ways. This call to ar ms is a must-read for any psychologist or social scientist working in the public health field.