This handbook builds on the twenty-year history of standard works on supervision and reflects the current state of this complex consulting process. Thirty-five recognized supervisors from Germany, Austria, and Switzerland provide a profound introduction and overview of the consulting process of supervision in connection with mediation, coaching, and organizational consulting across five chapters. The authors emphasize that supervision has now developed into a differentiated and flexible consulting process that meets the needs of clients. Contributions are made by Gabi Baer, Peter Berker, Ferdinand Buer, Beatrice Conrad, Arthur Drexler, Jörg Fengler, Angela Gotthardt-Lorenz, Helmut Hallier, Ilse Hantschk, Rolf Haubl, Brigitte Hausinger, Peter Heintel, Rudolf Heltzel, Sylvia Hüttig-Rieck, Mandana Kerschbaumer, Wolfgang Knopf, and Peter Kutter.