Osprey Books, campaign series books #54, Shiloh 1862 the death of innocence. This pamphlet type of book(96 pages) gives you a quick overview of the battle. And it's small enough to carry with you during your tour. One of my favorites is the old pamphlet that the Department of Interior put out way, way back 1955, and mine was reprinted in 1961 . It's one of those little booklets that they put out for every battle. I collect them as I find them. Lots of pictures and maps.