This volume was published as a part of the research project of the Petőfi Literary Museum–Kassák Museum K-120779 entitled “Lajos Kassák’s avant-garde journals from an interdisciplinary perspective (1915–1928)”, supported by the National Research, Development and Innovation Office. The volume was created as an excipient for research and education of the Petőfi Literary Museum–Kassák Museum. The publication of this volume was made possible through the support of the Fondation Jan Michalski (Montricher, Switzerland).