Here are some of his most notable works:
Nonfiction:
* Up the Amazon and Down the Rio Negro (1939): An account of La Varre's adventurous journey through the Amazon rainforest, including encounters with indigenous tribes and experiences with the local flora and fauna.
* The Colossus of Marajó (1941): An exploration of the mysterious history and myths surrounding the island of Marajó in the Amazon River delta, including theories about a lost civilization.
* The Dry Season (1943): A fictionalized account of his experiences as a gold prospector in Brazil.
* The White Road (1946): A travelogue about a journey through the Andes Mountains, covering the history and culture of the region.
* South American Saga (1948): A sweeping overview of his travels and adventures throughout South America.
* The Eagle's Shadow (1950): A fictionalized account of his experiences as a journalist covering the assassination of President Enrique Mora in Ecuador.
* The Gallows Bird (1952): A suspenseful novel about a search for a lost treasure in the Amazon.
* The Road to Eldorado (1953): A fictionalized account of his search for the legendary lost city of El Dorado.
* The Golden Valley (1956): A novel about a group of adventurers searching for gold in the Amazon.
Fiction:
* The Silent One (1951): A novel about a mysterious man who appears in a remote Amazonian village.
La Varre was known for his vivid descriptions of the natural world, his encounters with different cultures, and his adventurous spirit. His books are considered classics of travel literature and continue to be enjoyed by readers today.
While these are some of his best-known works, he authored many other books, including short stories and articles.
For a more complete list of his publications, you can consult online resources like WorldCat or the Library of Congress.