In this case study book we present authentic case studies of selected mid-sized companies from Europe with market leading positions in a transformational context for management. Alle case studies have been elaborated on the basis of the integrated case method (ICM) in intense cooperation with the companies and the respective top management. This novel approach to case research and teaching has been developed throughout the EU funded ERASMUS+ project ECASA (European CAse Study Alliance). Case study learning and teaching offers students and lecturers a great opportunity for class discussions on prevailing topics. Case studies can be used for individual and group work. The structure of the cases allows lecturers to use it in different contexts regarding exercises and educational objectives. Case teaching provides an interactive and challenging environment, involving diverse perspectives and complex interdependencies that trigger thoughts and discussions about practical business challenges.