Subjects: the river and i (sorted by popularity)
- Legends -- Rhine River 316 downloads
- Rivers -- Juvenile literature 316 downloads
- Natural history -- Amazon River Valley 304 downloads
- Indus River Valley -- Description and travel 301 downloads
- Amazon River Region -- Juvenile fiction 284 downloads
- Columbia River 274 downloads
- Thoreau, Henry David, 1817-1862 -- Travel -- Merrimack River (N.H. and Mass.) 273 downloads
- Merrimack River (N.H. and Mass.) -- Description and travel 273 downloads
- Thoreau, Henry David, 1817-1862 -- Travel -- Massachusetts -- Concord River 273 downloads
- Concord River (Mass.) -- Description and travel 273 downloads
- Ohio River Valley -- History 269 downloads
- Yukon River Valley (Yukon and Alaska) -- History -- 19th century -- Fiction 268 downloads
- Gold mines and mining -- Yukon River Valley (Yukon and Alaska) -- Fiction 268 downloads
- Ohio River -- Description and travel 265 downloads
- Birds -- Danube River 265 downloads
- Rhône River (Switzerland and France) -- Poetry 246 downloads
- Mississippi River Valley -- Discovery and exploration 243 downloads
- Nile River Valley -- Discovery and exploration 239 downloads
- Railroads -- Euphrates River Valley 234 downloads
- Putumayo River 230 downloads
- Missouri River -- Juvenile fiction 223 downloads
- Frontier and pioneer life -- Mississippi River Valley 223 downloads
- Orinoco River (Venezuela and Colombia) 217 downloads
- River boats -- Fiction 213 downloads
- Mississippi River -- Discovery and exploration 209 downloads