Brenda Schmahmann is a research professor in the Faculty of Art, Design, and Architecture at the University of Johannesburg. She is the author of many articles and books, the most recent of which is Picturing Change: Curating Visual Culture at Post-Apartheid Universities. Hans Ulrich Obrist is a curator, critic, and art historian. He is co-director of exhibitions and programs and director of international projects at the Serpentine Gallery, London. Mayen Beckmann is the granddaughter of Max Beckmann and the editor of several publications that focus on the artist. Ruth Fine is a curator at the National Gallery of Art, Washington, D.C., and the author of the introduction to The Prints of Roy Lichtenstein: A Catalogue Raisonne, 1948-1993. Sidney B. Felsen is cofounder and co-director of Gemini G.E.L., an artists' workshop and publisher of limited-edition prints and sculptures in L.A., and it had a long-standing publishing relationship with Roy Lichtenstein.