Design is increasingly regarded as an autonomous knowledge culture. This view on one hand follows certain epistemological premises, on the other hand promotes strategic interests concerning the autonomy of the field. Thereby, demarcated borders between design, art, and science are questioned and renegotiated under the notion of a design turn. In her book, Claudia Mareis retraces interferences between design and knowledge discourses since the Design Methods Movement in the 1960s. She contributes to the understanding of historical influences that shaped the debates around knowledge in design theory and research of today.