Dyadic health science—a fast-growing interdisciplinary field of health research—is the study of how people in close, personal relationships navigate health challenges and illness together. Connell School of Nursing Professor and the Elizabeth Power Keohane Faculty Fellow Karen Lyons is co-author of a new book on the subject that provides a historical overview, discussion of current challenges in the field, and tips on how to build a program of research. In Dyadic Health Science: Theories, Methods, and Future Directions (Cambridge University Press, 2026), Lyons and co-authors Amy J. Rauer (University of Tennessee) and Christine M. Proulx (University of Vermont) detail how the field has evolved over time, exploring its links to relationship science, psychology, nursing and health-related fields, family science, social work, gerontology, and the science of behavior change.