Henry R. Luce Professor of the Civil War Era and Director of Civil War Era Studies Allen Guelzo's "Gettysburg: The Last Invasion" was featured as a top book of 2013 by The Economist.
From the Economist:
Gettysburg: The Last Invasion. By Allen Guelzo. Knopf; 656 pages; $35.
An intimate, readable new account of the three-day battle that has already been much written about. Hugely detailed and realistic, “Gettysburg” manages to be both fascinating and fresh.