What is missing? There is clarity about what really works in practice, what is important and what have proven promising ideas that may become relevant. In addition, how many of the numerous publications from the many self-styled “gurus” can you use? Which sometimes neglected aspects are important for the modern leader? What leadership approaches are important and what is negligible? What do you need for your everyday management? What is new and yet already outdated, or already old but still of real value today?