The Walt Whitman Archive (co-edited with Ed Folsom)
The Charles Chesnutt Digital Archive, co-edited with Stephanie Browner and Matt Cohen
Books and Selected Articles
Whitman in Washington: Becoming the National Poet in the Federal City (under contract, Oxford University Press).
Literary Studies in the Digital Age: An Evolving Anthology, ed. with Ray Siemens (Modern Language Association, 2013).
Leaves of Grass: The Sesquicentennial Essays, ed. with Susan Belasco and Ed Folsom (University of Nebraska Press, 2007)
Re-Scripting Walt Whitman: An Introduction to His Life and Work (with Ed Folsom (Blackwell Publishing, 2005)
To Walt Whitman, America (University of North Carolina Press, 2004)
Critical Essays on James Weldon Johnson, ed. with Lawrence J. Oliver (G. K. Hall, 1997).
Walt Whitman: The Contemporary Reviews (Cambridge University Press, 1996).
Periodical Literature in Nineteenth-Century America, ed. with Susan Belasco Smith (University Press of Virginia, 1995).
Critical Essays on George Santayana, ed. with Robert C. Leitz, III (G.K. Hall, 1991).
Whitman and Tradition: The Poet in His Century (Yale University Press, 1990).
Dear Brother Walt: The Letters of Thomas Jefferson Whitman, ed. with Dennis Berthold (The Kent State University Press, 1984).
"Edition, Project, Database, Archive, Thematic Research Collection: What's in a Name?" forthcoming in Digital Humanities Quarterly, 2009.
"Electronic Scholarly Editions" in the Blackwell Companion to Digital Literary Study, ed. Susan Schreibman and Ray Siemens (Blackwell Publishing, 2007), pp. 434-50.
"Sixty-Eight Previously Uncollected Reviews of Walt Whitman," co-authored with Brett Barney, Amanda Gailey, Ted Genoways, Charles Green, Heather Morton, and Yelizaveta Renfro, Walt Whitman Quarterly Review, 25 (Summer/Fall 2007), 1-76.