In 1966, Sol LeWitt conceived a new type of work, 'drawings without drawing', replacing traditional drawing by using various ways of folding paper.In 1969, he started to regularly produce what he called Folds, first as gifts to friends, but then as works to be distributed by his dealers. In 1971 he added the Rips, drawings made of ripped paper.LeWitt went from ripping papers of various sizes and colours in different ways, to working with city maps, air view photos of Florence, Manhattan and Chicago from which he removed areas.The systematic approach on which LeWitt's work is based, was also applied to the Folds and Rips, and so they most often were created in series.The book presents these works for the first time, with a historical essay by influential Swiss curator Dieter Schwarz, and a complete catalogue of the Folds and the Rips.