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Boyd, Steven R.  Patriotic Envelopes of the Civil War (Baton Rouge:  Louisiana State University Press, 2010).

Bunker, Gary L.  From Rail-splitter to Icon:  Lincoln’s Image in Illustrated Periodicals, 1860-1865  (Kent OH:  Kent State University Press, 2001),

Halloran, Fiona Deans.  Thomas Nast:  The Father of Modern Political Cartoons (chapel Hill NC, 2012).

Lewin, J.G.  Lines of Contention:  Political Cartoons of the Civil War (New York:  Collins, 2007).

Reilly, Bernard F., Jr.  American Political Prints, 1766-1876   (Boston:  G.K. Hall, 1991).

Smith, Kristen M.  The Lines Are Drawn:  Political Cartoons of the Civil War  (Athens GA:  Hill Street Press, 1999).