The list author says: "As I wrote Year of Disunion, I found myself turning over and over to certain resources. In recent years, the Internet has also been helpful, but I continue to rely on these books. The first volume was on 1861, so the resources tend toward the beginning of the war. But, now, as I begin Volume II, "Year of Atonement," set in 1862, I'll be adding some new resources that treat some of the new areas I plan to explore including: the war in Charleston, SC; early settlements in Boulder, CO; slaves escaping to Canada and their lives there.
This is just a start . . . they are simply in order of how quickly they came to mind, and how quickly I found them on my bookshelves. I am scanning my bookshelf and see many more . . . I'll keep adding as I use them and/or remember them being useful."