 Walls has researched the intersections of literature and science in the works of Ralph Waldo Emerson, Henry David Thoreau, Alexander von Humboldt and related authors.She specializes in American Transcendentalism—especially Henry David Thoreau and Ralph Waldo Emerson, transatlantic romanticism, literature and science, and environmental literature and ecocriticism.Books authored

Books edited

Walls received the University of South Carolina’s Russell Research Award in spring 2010.