He is the author of several articles and books, including Road to Manassas (Cooper Square, 1961), and The Army of the Potomac, vol. 1: Birth of Command, September 1860 - September 1861 (Da Capo, 2002), and The Army of the Potomac, vol. 2: McClellan Takes Command: September 1861-February 1862 (August 2004).