Subjects: State by State (sorted by quantity of books)
- United States -- Territorial expansion 8 books
- United States -- Fugitive slave law (1850) 8 books
- United States -- Description and travel -- Early works to 1800 8 books
- United States -- History -- Revolution, 1775-1783 -- Drama 8 books
- United States -- Defenses 8 books
- Railroads -- United States 8 books
- Slavery -- United States -- History 8 books
- Natural history -- United States 8 books
- United States -- History -- 19th century -- Fiction 7 books
- Women -- Suffrage -- United States -- History 7 books
- Women's rights -- United States -- History 7 books
- Women -- Employment -- United States 7 books
- Socialism -- United States 7 books
- United States -- Politics and government -- 1857-1861 7 books
- World War, 1939-1945 -- United States -- Fiction 7 books
- United States -- Social life and customs -- To 1775 7 books
- United States -- History -- Colonial period, ca. 1600-1775 -- Sources 7 books
- Agriculture -- United States -- Periodicals 7 books
- Labor -- United States 7 books
- United States -- History -- War of 1812 -- Personal narratives 7 books
- Immigrants -- United States 7 books
- Democracy -- United States 7 books
- Fugitive slaves -- United States 7 books
- World War, 1914-1918 -- Regimental histories -- United States 7 books
- United States -- History -- Civil War, 1861-1865 -- Women 7 books