This textbook provides an in-depth portfolio of case studies of globally operating and market leading medium-sized companies, mostly based in Germany. Students in the field of strategic management, family business management, information technology, and engineering may comprehensively explore the success factors of these hidden champions. Assignments and discussion sections help to dive deeper into the topics of innovation, internationalization, and leadership. Practitioners may gain valuable insights into growth trajectories and strategic decisions for achieving and sustaining market leadership. All case studies have been developed in direct cooperation with the companies and tested in teaching.