This textbook presents a much-needed overview of the recent developments in implementation science — a discipline that is young, has gained increasing attention in recent years, and has experienced substantial and rapid growth in knowledge production and debate. It captures the latest developments in research and pushes the reader toward the next phase for implementation science: bridging the science-to-practice divide. Drawing from multidisciplinary, international research by top scholars in the field, this book provides a critical but friendly approach to understanding what implementation science is, what it isn’t, and where it’s going. Topics include: • Factors associated with effective implementation • Organizational context and readiness for change • Implementation theories, models, and frameworks • Enhancing implementation measurement • Bringing interventions to scale • Closing the science-practice gap in implementation Implementation Science 3.0 is a timely, important resource for researchers, students, and others with an interest in implementation working across the fields of social welfare,public health, education, and psychology. The chapter “Making sense of implementation theories, models and frameworks”,in which some modifications to the text were made, is available open access under a Creative Commons Attribution 4.0 International License in Nilsen, P. (2015). Implementation Science, 10(53), via link.springer.com.