Book excerpt: Mary Oliver is one of America's best-loved poets, the winner of the Pulitzer Prize and the National Book Award. Her luminous poetry celebrates nature and beauty, love and the spirit, silence and wonder, extending the visionary American tradition of Whitman, Emerson, Frost and Emily Dickinson. Her extraordinary poetry is nourished by her intimate knowledge and minute daily observation of the New England coast, its woods and ponds, its birds and animals, plants and trees.