Books
The Great Partnership: Robert E. Lee, Stonewall Jackson, and the Fate of the Confederacy
(New York: Pegasus Books, 2019)
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Chancellorsville and the Germans: Nativism, Ethnicity, and Civil War Memory
(New York: Fordham University Press, 2007)
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Pennsylvania: A Military History
Co-authored with William A. Pencak and Barbara A. Gannon. (Yardley, PA: Westholme Publishing, 2016)
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The Civil War: A Visual History
Co-authored with Wayne Hsieh, Robert Sandow, et.al. (London: Dorling-Kindersley, 2011). Published in association with the Smithsonian Institution.
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Damn Dutch: Pennsylvania Germans at Gettysburg
Co-authored with David L. Valuska (Mechanicsburg, PA: Rowman & Littlefield/Stackpole Books), 2004
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