This book originates from a pioneering study on adolescent social networks and sexual practices in Eastern Africa, specifically Ethiopia. It represents a significant breakthrough in applying mixed methods research (MMR) to the field of social network analysis. Drawing on firsthand data, the book tests theories and models related to social networks and human behavior. It contributes to the development of the "third wave" in research paradigms by integrating both quantitative and qualitative approaches. This work is particularly valuable for social work educators, researchers, and practitioners interested in applying social network analysis to understand adolescent reproductive health and promote the well-being of young people. This book is also highly recommended as a teaching resource for courses on adolescent health and group dynamics.