(2015) Book: "A House Divided: The Lives of Ulysses S. Grant and Robert E. Lee". Revised edition. New York: Sky Pony Press. ISBN-10: 1632206048; ISBN-13: 9781632206046
(2021) Book: "Robert E. Lee: A Life". New York: Alfred A. Knopf. ISBN-10: 1101946229; ISBN-13: 9781101946220
(2018) Book: "Reconstruction: A Concise History" New York: Oxford University Press. ISBN-10: 0190865695; ISBN-13: 9780190865696
(2013) Book: "Gettysburg: The Last Invasion". New York: Alfred A. Knopf. ISBN-10: 0307594084; ISBN-13: 9780307594082
(2016) Book: "Redeeming the Great Emancipator". Cambridge, MA and London: Harvard University Press. ISBN-10: 0674286111; ISBN-13: 9780674286115