Complex sentence: His nonfiction has featured nature and travel, as in "The Snow Leopard" (1978), or American Indian issues and history, as in his detailed study of the Leonard Peltier case, "In the Spirit of Crazy Horse" (1983).
Split into simpler sentences: His nonfiction has featured nature and travel, as in "The Snow Leopard" (1978). Or American Indian issues and history, as in his detailed study of the Leonard Peltier case, "In the Spirit of Crazy Horse" (1983).