Books in World War I (sorted alphabetically)
- Sherwood Foresters in the Great War 1914 - 1919 W. C. C. Weetman
- Short History of the 6th Division: Aug. 1914-March 1919
- Short History of the Great War A. F. Pollard
- Sir John French: An Authentic Biography Cecil Chisholm
- Sixteen Months in Four German Prisons: Wesel, Sennelager, Klingelputz, Ruhleben Frederick Arthur Ambrose Talbot
- Six Women and the Invasion Gabrielle Yerta and Marguerite-Yerta Méléra
- Sketches of the East Africa Campaign Robert Valentine Dolbey
- Soldier silhouettes on our front William L. Stidger
- Soldier's Sketches Under Fire Harold Harvey
- Some Naval Yarns Mordaunt Hall
- Some War-time Lessons Frederick P. Keppel
- Somewhere in France Richard Harding Davis
- Song of the Guns Gilbert Frankau
- Soul of Democracy Edward Howard Griggs
- Soul of the Soldier: Sketches from the Western Battle-Front Thomas Tiplady
- Soul of the War Philip Gibbs
- Souvenirs de l'armée américaine en France (French) Jean Berne-Bellecour
- Specimens of British Trench Orders Army War College
- Stories of the Ships Lewis R. Freeman
- Story of the 2/4th Oxfordshire and Buckinghamshire Light Infantry Geoffrey Keith Rose
- story of the 6th Battalion, the Durham Light Infantry : France, April 1915-November 1918
- Story of the "9th King's" in France Enos Herbert Glynne Roberts
- Story of the Great War, Volume 1
- Story of the Great War, Volume 2
- Story of the Great War, Volume 3