Amazon River
Free to read here, from Project Gutenberg.
Perils and Captivity
The Andes and the Amazon; Or, Across the Continent of South America
The Giant Raft
Across the Andes
The Sea and the Jungle
Oregon and Eldorado; or, Romance of the Rivers
On the Banks of the Amazon
The Forest Exiles: The Perils of a Peruvian Family in the Wilds of the Amazon
Life of Rear Admiral John Randolph Tucker
Up the Amazon and Madeira rivers, through Bolivia and Peru
La Jangada: Huit cent lieues sur l'Amazone
The River Motor Boat Boys on the Amazon; Or, The Secret of Cloud Island
Unter Wilden am Amazonas