Book excerpt: Ed Sarafino and Timothy Smith draw from the research and theory of multiple disciplines in order to effectively demonstrate how psychology and health impact each other. The newly updated 9th Edition of Health Psychology: Biopsychsocial Interactions includes a broader picture of health psychology by presenting cross-cultural data. Furthermore, international examples are also included to further explore the psychologist's perspective of health issues around the world and highlight what works in the field. The psychological research cited in the text supports a variety of behavioral, physiological, cognitive, and social/personality viewpoints. An emphasis on lifespan development in health and illness is integrated throughout the text.