Thoreau, Henry David. Walden; or, Life in the Woods. New York: Dover Publications, Inc., 1995. 216 pp. Paperback.
The complete text of Thoreau's first book, neatly packaged in a Dover Thrift Edition. In A Week on the Concord and Merrimack Rivers, Thoreau outlines the river excursion he took with his brother John and the adventures they encountered.
This essay is also available with Emerson's essay "Nature" in Nature/Walking.