He is the author of Seeing Drugs: Modernization, Counterinsurgency, and U.S. Narcotics Control in the Third World (Kent, OH, 2011). He is currently working on a co-edited volume (with Matthew Pembleton) on U.S. foreign relations and drug history. He is the author of "The Politics of Contamination: Herbicides, Drug Control, and Environmental Law", recently published in Diplomatic History.