The premise of this book is that artists use their art to think about their experience; it gives them a language in which to work out a way of existing in the world. So the front and back of the cover are illustrated with some of the great artists featured in the book doing their work. FRONT COVER: 1. Yoko Ono in the first performance of Cut Piece, Yamaichi Hall, Kyoto, 1964 photo courtesy Lenono Photo Archive © Yoko Ono 2. Ann Hamilton wearing her 1984 # 13: Toothpick Suitchair photo courtesy Ann Hamilton Studio 3. Josef Beuys lecturing with a blackboard, New York, 1974 photo photo by Peter Moore © Estate of Peter Moore/ VAGA, New York 4. Ilya Kabakov performingThe Walk with Ilya Kabakov, Moscow, circa 1980 photo © Yuri Rost 5. Christo and Jeanne-Claude talking to workers atThe Gatesassembly plant in Queens, N.Y., February 2005 photo Wolfgang Volz 6. Jackson Pollock painting, East Hampton, N.Y., 1950 © The Pollock-Krasner Foundation ARS, NY and DACS, London 2010 , photo by Hans Namuth. Courtesy Center for Creative Photography, The University of Arizona. Photograph © Hans Namuth Estate SPINE: 7 Cai Guo-Qiang inThe Century with Mushroom CloudsProjects for the 20th Century, 1996 Photograph by Hiro Ihara, courtesy of the artist BACK COVER: 8. Roxy Paine weldingConjoined, Madison Park, N.Y.C., 2007 photo © Sofia M. Paine 9. Louise Bourgeois at home working on her mixed media sculptureConfrontation, New York, 1982 photo Inge Morath, courtesy Louise Bourgeois Studio/© Louise Bourgeois. DACS, London/VAGA, New York 2010 10. Andy Warhol during the filming of Lupe Velez (portrayed by Edie Sedgwick) in the home of Panna Grady at the Dakota apartment building, New York, 1965 photo © Nat Finkelstein 11. Kerry James Marshall drawing, Chicago, 2009 photo by J. Fineberg 12. David Smith welding, Bolton Landing, 1952 photo © John Stewart 13. Robert Arneson, modeling a self portrait, Benicia, California, 1978 Photo courtesy and © estate of Robert Arneson/DACS, London/VAGA, New York 2010Jonathan Fineberg is the author of 'Art Since 1940 (3rd Edition)', published 2010 under ISBN 9780131934795 and ISBN 0131934791.