Peter Matthiessen (1927–2014) was an American novelist, naturalist, wilderness writer, and CIA agent. A co-founder of The Paris Review, he was a 2008 National Book Award winner. He was also a prominent environmental activist. His nonfiction featured nature and travel, including The Snow Leopard, and American Indian issues and history, such as a controversial study of the Leonard Peltier case, In the Spirit of Crazy Horse. His early story “Travelin’ Man” was made into the 1960 film The Young One, directed by Luis Buñuel, and his novel At Play in the Fields of the Lord (1965) into a 1991 film. He lived in Sagaponak, New York.