Providing a complete portal to the world of case study research‎,‎ the Fourth Edition of Robert K‎.‎ Yin‎'‎s bestselling text "Case Study Research" offers comprehensive coverage of the design and use of the case study method as a valid research tool‎.‎ This thoroughly revised text now covers more than 50 case studies ‎(‎approximately 25 per cent new‎)‎‎,‎ gives fresh attention to quantitative analyses‎,‎ discusses more fully the use of mixed methods research designs‎,‎ and includes new methodological insights‎.‎ The book‎'‎s coverage of case study research and how it is applied in practice gives readers access to exemplary case studies drawn from a wide variety of academic and applied fields‎.‎ The fourth edition highlights each specific research feature through 44 boxed vignettes that feature previously published case studies‎.‎ It provides methodological insights to show the similarities between case studies and other social science methods‎.‎ It suggests a three‎-stage approach to help readers define the initial questions they will consider in their own case study research‎.‎ It covers new material on human subjects protection‎,‎ the role of Institutional Review Boards‎,‎ and the interplay between obtaining IRB approval and the final development of the case study protocol and conduct of a pilot case‎.‎ It includes an overall graphic of the entire case study research process at the beginning of the book‎,‎ then highlights the steps in the process through graphics that appear at the outset of all the chapters that follow‎.‎ It offers in‎-text learning aids including ‎'‎tips‎'‎ that pose key questions and answers at the beginning of each chapter‎,‎ practical exercises‎,‎ endnotes‎,‎ and a new cross‎-referencing table‎.‎ "Case Study Research‎,‎ Fourth Edition" is ideal for courses in departments of Education‎,‎ Business and Management‎,‎ Nursing and Public Health‎,‎ Public Administration‎,‎ Anthropology‎,‎ Sociology‎,‎ and Political Science‎.‎