Bruce Catton was known as a popular historian when he first published books about the American Civil War, because of his narrative nonfiction format. All of the books being released digitally now are ones previously published in a non-digital age. This reviewer hunted down Catton’s three volume Centennial History of the Civil War at a used bookstore some time back, and although they were among the best I have ever read by anyone on this topic, I was convinced that anything he had published earlier on the subject was probably repackaged in this trilogy, and so I stopped reading Catton, thinking I was done. Thank goodness Net Galley and Open Road Integrated Media posted the galley for this second volume of Catton’s Army of the Potomac trilogy. Now that I am disabused, I will have to find the first and third volumes also, because Catton is so eloquent that he…