One hundred years after his birth, Marcel Duchamp remains an enigma; no other artist, perhaps, has produced so varied a group of masterpieces in so short a span of time. These eleven illustrated essays explore the structure and meaning of Duchamp's work as part of an ongoing critical enterprise that has just begun. Ranging from the Munich period and the development of the ready-mades to the last work, Etant donnes, they present the latest thinking on Duchamp and his ideas.