"Marcel Duchamp has influenced the art of the 20th century more than anyone else except Pablo Picasso. One can reasonably claim that without his work, art history would have taken a different course," writes Herbert Molderings in his text on Marcel Duchamp as a sculptor. With his ready-mades, the Roue de bicyclette [Bicycle Wheel] from 1913 or the Porte bouteille [Bottle Dryer] from 1914, he significantly expanded the idea of a work of art - an expansion of borders that was to have major consequences for the development of art in the 20th century. The first edition of Marcel Duchamp - Respirateur in 1995 was sold out shortly after publication. Now this beautifully designed book, a bibliophile treasure, is available again. It focuses on the structural basis of Duchamp's oeuvre, the intellectual attitude and the methods he developed to interrupt the utilitarian flow of objects. A selection of statements by Duchamp, printed on parchment paper, give an insight into his aesthetic concept, and not least into the French artist's enigmatic wit and irony. The artist: Marcel Duchamp (Blainville near Rouen 1887-1968 Neuilly-sur- Seine). 1904 studied at the Académie Julian in Paris. In 1913 his work Nude Descending a Staircase was displayed in the Armory Show in New York. In 1914 he created his first ready-made. From 1915 he lived alternately in Paris and New York. From 1923, Duchamp no longer worked as an artist, but collaborated on some experimental films.