Editor,The Blackwell Companion to American Literature, Volume 2: 1820-1914 (Wiley-Blackwell, forthcoming).
Co-editor, with Susan Belasco, The Bedford Anthology of American Literature: Volume 1, Beginnings to 1865; and Volume 2, 1865 to the Present. First Edition (Bedford/St. Martins, 2008); Second Edition (Bedford/St. Martins, 2014).
Thoreau's Complex Weave: The Writing of "A Week on the Concord and Merrimack Rivers," With the Text of the First Draft (University Press of Virginia, 1986).
Historical Introduction to The Illustrated "A Week on the Concord and Merrimack Rivers" (Princeton University Press, 1983).
Historical Introduction to A Week on the Concord and Merrimack Rivers (1980) in the Princeton University Press edition of The Writings of Henry D. Thoreau.
Editorial Contributions, the Journal, Volumes 1 (1980) and 2 (1984) in the Princeton University Press edition of The Writings of Henry D. Thoreau.
The Oxford Handbook of Transcendentalism (Oxford University Press, 2010).
The Emerson Dilemma: Essays on Emerson and Social Reform (University of Georgia Press, 2001).
Approaches to Teaching Thoreau's "Walden" and Other Works (Modern Language Association, 1996).
The Cambridge Companion to Henry David Thoreau (Cambridge University Press, 1995).
Critical Essays on Henry David Thoreau's "Walden" (G.K. Hall, 1988).
Entries in the Biographical Dictionary of Transcendentalism and the Encyclopedia of Transcendentalism (Greenwood Press, 1996).
Numerous articles and reviews in various journals, including American Literature, Emerson Society Papers, ESQ: A Journal of the American Renaissance, Modern Intellectual History, New England Quarterly, Nineteenth-Century Literature, Resources for American Literary Study, Studies in the American Renaissance, Studies in Bibliography, Thoreau Society Bulletin, and the Walt Whitman Review.