Harding, Walter. The Days of Henry Thoreau. New York: Knopf, 1965.

Harding's biography remains the most accurate and representative treatment of Thoreau.

Harding, Walter, ed. Thoreau: Man of Concord. New York: Holt, Rinehartand Winston, 1962. Harding has compiled a selection of assessments of Thoreau by his Concord contemporaries. An excellent source for a good picture of this enigmatic individual.

Thoreau, Henry D. The Illustrated Wdlden. Edited by J. Lyndon Shanley.

Princeton, NJ: Princeton University Press, 1973. This edition of Thoreau's greatest work contains photographs by Herbert Wendell Gleason, a nineteenth-century photographer who journeyed to Walden Pond and Concord a few short decades after Thoreau lived there. His photographic journal, reproduced in the pages of this popular edition, gives the student a wonderful pictorial view of Walden as Thoreau might have seen it.

A Week on the Concord and Merrimack Rivers. Edited by Carl Bove, et al. Princeton, NJ...