I'd never seen this 2011 article until yesterday so I thought others might have missed it as well. In it, author Malcom Jones, who writes about books, music, and photography for the Daily Beast and Newsweek, puts forth what he considers to be the eleven best Civil War books of all time, "just in time for the sesquicentennial."
Jones admits that assembling such a list is "an absurd task, simply because—no kidding—so many are essential." There are more than a few on this list that I would have excluded, but that's probably the case for anyone.
Just off the top of my head, I would delete the Horowitz and Foner books, as much as I love the former. Then replace them with Edwin Coddington's The Gettysburg Campaign and Hattaway and Jones' How the North Won.