Henry David Thoreau was a twenty-year-old scholarship student at Harvard when he met Ralph Waldo Emerson in 1837. Emerson, fourteen years Thoreau's senior and independently wealthy, had recently shaken the intellectual world of New England with the publication of Nature. Despite the disparity in their circumstances, Thoreau and Emerson quickly formed a close relationship that lasted until Thoreau's death at the age of forty-four. This book...