This document provides an overview of case study research. It defines case studies as qualitative methods that focus on a bounded system through descriptive or explanatory questions. Case studies are particularistic, descriptive, and heuristic. They provide thick descriptions of a situation or event to give readers personal insight. The document discusses conducting single and multiple case studies and different analysis techniques. It also distinguishes between narrative studies and case studies. Several examples of published case studies are provided along with references.