Subjects: the river and i (sorted by popularity)
- Lehigh River Valley (Pa.) -- Pictorial works 53 downloads
- River boats -- Juvenile fiction 52 downloads
- Rock River (Wis. and Ill.) 51 downloads
- Wisconsin River (Wis.) 51 downloads
- Javari River (Brazil and Peru) -- Discovery and exploration 51 downloads
- Delaware River Valley (N.Y.-Del. and N.J.) -- Fiction 51 downloads
- Fox River (Wis. and Ill.) 51 downloads
- Paddle steamers -- Mississippi River -- Drama 50 downloads
- Geul River Valley (Belgium and Netherlands) -- Description and travel 50 downloads
- Allagash River (Me.) -- Juvenile fiction 49 downloads
- Thames River (England) -- Juvenile fiction 49 downloads
- Floods -- Ohio River Valley -- Poetry 49 downloads
- Hudson River (N.Y. and N.J.) -- History 49 downloads
- Saint Lawrence River Region -- Fiction 49 downloads
- Xingu River (Brazil) -- Juvenile fiction 47 downloads
- Amazon River -- Navigation 46 downloads
- River Raisin, Battle of the, Monroe, Mich., 1813 46 downloads
- Kinloch, Arthur, active 19th century -- Travel -- Australia -- Murray River (N.S.W.-S.A.) 45 downloads
- Murray River Region (N.S.W.-S.A.) -- Description and travel 45 downloads
- James River and Kanawha Canal (Va.) -- Navigation 45 downloads
- Murray River (N.S.W.-S.A.) -- Description and travel 45 downloads
- Oklawaha River (Fla.) -- Description and travel -- Juvenile fiction 45 downloads
- Frontier and pioneer life -- Ohio River Valley -- Juvenile fiction 44 downloads
- Fur traders -- Yellowstone River Valley -- Fiction 44 downloads
- Ohio River -- Description and travel -- Juvenile literature 44 downloads