Subjects: the river and i (sorted by popularity)
- Stones River, Battle of, Murfreesboro, Tenn., 1862-1863 298 downloads
- Indus River Valley -- Description and travel 289 downloads
- Natural history -- Amazon River Valley 287 downloads
- Legends -- Rhine River 273 downloads
- Ohio River Valley -- History 271 downloads
- Amazon River Region -- Juvenile fiction 269 downloads
- Thoreau, Henry David, 1817-1862 -- Travel -- Merrimack River (N.H. and Mass.) 268 downloads
- Merrimack River (N.H. and Mass.) -- Description and travel 268 downloads
- Thoreau, Henry David, 1817-1862 -- Travel -- Massachusetts -- Concord River 268 downloads
- Concord River (Mass.) -- Description and travel 268 downloads
- Arno River Valley (Italy) -- Description and travel 263 downloads
- Birds -- Danube River 262 downloads
- Railroads -- Euphrates River Valley 257 downloads
- Mississippi River Valley -- Discovery and exploration 254 downloads
- Yukon River Valley (Yukon and Alaska) -- History -- 19th century -- Fiction 246 downloads
- Gold mines and mining -- Yukon River Valley (Yukon and Alaska) -- Fiction 246 downloads
- Ohio River -- Description and travel 241 downloads
- Putumayo River 241 downloads
- Frontier and pioneer life -- Mississippi River Valley 235 downloads
- Mississippi River -- Discovery and exploration 220 downloads
- Frontier and pioneer life -- Ohio River Valley 218 downloads
- Moselle River Valley 217 downloads
- Orinoco River (Venezuela and Colombia) 216 downloads
- Missouri River -- Juvenile fiction 213 downloads
- Nile River Valley -- Discovery and exploration 211 downloads