The remarkable breadth of C. S. Lewis's (1898--1963) work is nearly as legendary as the fantastical tales he so inventively crafted. A variety of themes emerge in his literary output, which spans the genres of nonfiction, fantasy, science fiction, and children's literature, but much of the scholarship examining his work focuses on religion or philosophy. Overshadowed are Lewis's views on nature and his concern for environmental stewardship, which...