MARCEL DUCHAMP, BY ROBERT LEBEL WITH MARCEL DUCHAMP, ANDRÉ BRETON, AND H. P. ROCHÉ. New York: Hauser & Wirth Publishers, 2021. 252 pages. TOWARD THE END of his life, in 1966, Marcel Duchamp was asked why he had never had a solo exhibition in his native France. “I don’t know. I never understood. I think it’s a question of money,” he replied. “The dealers have nothing to gain from me. . . The museums are run, more or less, by the dealers.”This candor was calculated, all part of Duchamp’s schtick. Since the mid-1920s after a terrifyingly productive decade in which he reimagined Cubist painting,