Probably the best bibliographic source on the Civil War is The American Civil War: a Handbook of Literature and Research
By Steven E. Woodworth (1996). From the foreword by James M. McPherson: "The single most important volume for anyone interested in the Civil War to own and consult.The first guide to Civil War literature to appear in nearly 30 years, this book provides the most comprehensive, up-to-date, and informative survey and analysis of the vast body of Civil War literature... "

RE: Adams' Great Britain and the American Civil War, 1925-
In passing, its interesting to note that the 1920's saw a massive resurgence of the Ku Klux Clan and was an era of particularly vicious racism. Between 1919 and 1922, 239 blacks were lynched by white mobs and many more were killed by individual acts of violence and unrecorded lynchings.