The research project Didaktika has given rise to a four-volume series with the overall title of “Grundlagen zur Gestaltung – Werkzeug und Methoden für Gestalterinnen und Gestalter” (Fundamentals of Design – Tools and Methods for Designers), in which the designer’s tools of the trade are described and put across in an illuminating way. Each volume approaches the subject from a different angle. Volume 1 is concerned with processes and programmes, volume 2 with structures and systems, volume 3 with signs and contexts and the fourth and last volume with identities and differences. These books give readers a clear and practical overview of the fundamentals of design in compact form, as was the aim of the research project.