Critical text by S.D. Sauerbier. Artists featured in the publication include Yves Klein, John Cage, Robert Rauschenberg, Piero Manzoni, Gerhard Rühm, Bruce Nauman, György Ligeti, Tomas Schmit, Bernard Höke, Emilio Prini, and Ludwig Gosewitz. Printed in black-and-white. Text in German.