Books in US Civil War (sorted alphabetically)
- Rise and Fall of the Confederate Government, Volume 2 Jefferson Davis
- Rock of Chickamauga: A Story of the Western Crisis Joseph A. Altsheler
- Rodney, the Partisan Harry Castlemon
- Scouts of Stonewall: The Story of the Great Valley Campaign Joseph A. Altsheler
- Sequel of Appomattox: A Chronicle of the Reunion of the States Walter L. Fleming
- Shades of the Wilderness: A Story of Lee's Great Stand Joseph A. Altsheler
- Shiloh" as Seen by a Private Soldier Warren Olney
- Short Life of Abraham Lincoln John G. Nicolay
- Siege of Washington, D.C., written expressly for little people F. Colburn Adams
- Si Klegg, Book 1 John McElroy
- Si Klegg, Book 2 John McElroy
- Si Klegg, Book 3 John McElroy
- Si Klegg, Book 4 John McElroy
- Si Klegg, Book 5 John McElroy
- Si Klegg, Book 6 John McElroy
- Slavery and four years of war : a political history of slavery in the United States, together with a narrative of the campaigns and battles of the Civil War in which the author took part, 1861-1865. Vols. 1-2 Joseph Warren Keifer
- Soldier Boy; or, Tom Somers in the Army: A Story of the Great Rebellion Oliver Optic
- Some Personal Reminiscences of Service in the Cavalry of the Army of the Potomac Hampton Sidney Thomas
- Songs and Ballads of the Southern People: 1861-1865
- Son of the Gods, and A Horseman in the Sky Ambrose Bierce
- Southerner: A Romance of the Real Lincoln Jr. Thomas Dixon
- Southern Soldier Boy: A Thousand Shots for the Confederacy James Carson Elliott
- Speeches & Letters of Abraham Lincoln, 1832-1865 Abraham Lincoln
- Stand By The Union Oliver Optic
- Star of Gettysburg: A Story of Southern High Tide Joseph A. Altsheler