Subjects: State by State (sorted by popularity)
- Natural history -- Southern States 869 downloads
- Historic buildings -- United States 864 downloads
- Women -- United States -- Fiction 862 downloads
- Fugitive slaves -- United States -- History -- 19th century 855 downloads
- Picture books for children -- United States 855 downloads
- Clergy -- United States -- Biography 854 downloads
- Northwestern States -- Description and travel 854 downloads
- Southern States -- Periodicals 846 downloads
- Norwegians -- United States 845 downloads
- Home ownership -- United States 844 downloads
- Constitutions -- United States 836 downloads
- United States. Army -- Handbooks, manuals, etc. 833 downloads
- Natural history -- United States 832 downloads
- Confederate States of America. Army -- Biography 831 downloads
- United States -- Politics and government -- 1845-1861 830 downloads
- Unmarried mothers -- United States -- Biography 815 downloads
- United States -- History -- Revolution, 1775-1783 -- Campaigns 815 downloads
- Mistresses -- United States -- Biography 815 downloads
- Presidents -- United States -- Paramours 815 downloads
- Philanthropists -- United States -- Biography 813 downloads
- Technical education -- United States 810 downloads
- Petroleum industry and trade -- United States -- History 800 downloads
- Women spies -- United States -- Biography 798 downloads
- United States -- History -- Civil War, 1861-1865 -- Participation, Female 798 downloads
- Women soldiers -- United States -- Biography 798 downloads