Now in its 6th edition, The Handbook of Health Behavior Change continues to serve as the premier practical textbook for students, researchers, and health professionals in public health, health promotion, preventive and behavioral medicine, nursing, health communication, population health, and the behavioral sciences. It presents a foundational review of key theories, methods, and intervention strategies they will need to be both thoughtful and effective in promoting positive health behavior change. The book examines the complex challenges of improving health behavior in society including the upstream systems, economic, environmental, social, cultural and policy factors at play, as well as the interpersonal and intrapersonal behaviors that lead to disparate health outcomes among individuals and populations.