Jeff Koons: Celebration. Berlin: Neue Nationalgalerie, 2009. [Texts by Rainald Goetz and Anette Hüsch; interview with Koons by Peter-Klaus Schuster]. Jeff Koons: Hulk Elvis. New York: Gagosian Gallery, Rizzoli, 2009. [Text by Scott Rothkopf; interview with Koons by Hans Ulrich Obrist]. Fr...