His publications include two books, Image Duplicator : Roy Lichtenstein and the Emergence of Pop Art (Yale University Press, 2002) and James Rosenquist : Pop Art, Politics and History in the 1960s (University of California Press, 2009), as well as exhibition catalog essays and articles in such publications as Art Journal, Artforum, Parkett, and Art Bulletin. He is currently completing a book manuscript on the early twentieth-century American artist John Sloan, which focuses on Sloan's engagement with the field of popular illustration. In the fall of 2011, he was a visiting scholar at the Getty Research Institute in Los Angeles.