Setting out to dispel the argument that case study research lacks the science, theory, and therefore validity of other forms of research, the author combines many decades of experience as both a renowned scholar and a reflective practitioner to effectively bridge the divide between case theory and how it is applied in practice. Bringing the fundamental strengths of cases to the fore, he introduces the "Case Theory" concept as an expanded version of case study research which includes both methodology and the types of results that emerge by guiding the reader in the theoretical and philosophical underpinning, and demonstrating how to translate theory to pertinent research practice that address the real and consequential issues in business and management today. For students, academics, and researchers interested in the science and philosophy behind case study research, as well as the methodology, and is a thought-provoking read that will challenge beliefs about case study theory.