The Swiss artist Willi Gutmann created timeless works of outstanding beauty. His largest work, a 24.5-meter-tall sculptural group, stands in San Francisco. The smallest work is a dismountable cube, the sides of which measure only one centimeter. Such contrasts – monumental / miniature, taking apart / putting together, positive / negative, constructivist / organic – are characteristic of Willi Gutmann’s artistic work. The inclusion of the viewer in the final result of a work of art was one of his primary concerns. Although Willi Gutmann’s variable sculptures represent a unique contribution to kinetic art, they have yet to be appropriately appreciated. This book is the first comprehensive publication of the sculptural work of this extraordinary artist.