The
Senses of Walden: An Expanded Edition
http://www.press.uchicago.edu/cgi-bin/hfs.cgi/00/7774.ctl
by Stanley Cavell
ISBN: 0-226-09813-3
Walden
and Resistance to Civil Government: Authoritative
Texts, Thoreau's Journal, Reviews and Essays
in Criticism
by Henry David Thoreau, ed. William Rossi
ISBN: 0-393-95905-8