Dr. Patrick N. Allitt, Cahoon Family Professor of American History, recently authored an annotated list of five essential works on U.S. environmental history for the website Shepherd. Allitt’s most recent book is A Climate of Crisis: America in the Age of Environmentalism (Penguin, 2014), an intellectual history of American environmentalism since World War II. Find the list of recommendations here: “The best books to understand American environmental history.”