This book provides an introduction to ethics, research design as the most important part of the qualitative research process, the importance of theoretical frameworks and the relationship between the researcher and the researched in the qualitative research process. The book is organised according to the following chapters: ethics and introduction to qualitative research; qualitative research study design; qualitative methods - participant observation; qualitative methods - interviews, texts, and qualitative diaries; participatory and action research; data analysis - coding, storing and managing qualitative data; analysis - interpretation; validity and presentation of findings to different audiences. This book will be a valuable resource to health professionals, researchers, statisticians, data scientists, health programmers, policymakers, medical students, graduate and postgraduate students in public health and related disciplines.