Tom Slade Boy Scout by Percy K. Fitzhugh

Number One in the Tom Slade Series

Percy K. Fitzhugh's books are HERE

Bomba the Jungle Boy by Roy Rockwood

Bomba is a young man about 13 or 14 years old. He can not remember his parents, so something must have happened to him or his parents. He simply can not remember. Raised by a man named Cody Casson in the Amazon rain forest, Bomba the Jungle boys wants dearly to find out who his parents were, and where they are.
One day, while roaming the Amazon jungle, Bomba meets the explorers Dorn and Gillis and in doing so, saves their entire camp from a savage jaguar attack. Promising to return one day, they leave gifts (including a pistol) and then head for the coast while Bomba soon runs into a party of dreaded headhunters from the distant Giant Cataract. After escaping their clutches initially, the jungle boy secures the friendship of a local tribe,the Araos, before racing back to Cody, to defend all he holds dear.
Combating snakes, a cayman, vultures, pumas and vampire bats, Bomba returns to the hut he shares with the old naturalist, Cody Casson and by trickery, courage and the stout friendship of his local animal friends, they defeat the marauders.
Cody, who experiences moments of lucidity, recalls the names "Laura" and "Bartow" and adds that Jojasta, the Medicine Man of the distant Moving Mountain, can shed some light on Bomba's parentage. It is to this terrible land that Bomba will go to next, in his quest for knowledge of his past and origins!

Klondike Nuggets by Edward S. Ellis

The adventure story of two young men who find Klondike gold.  The trouble is, some very bad men know that they found it.  Will they be able to keep it, oro will the outlaws rule the day?  This is a thrilling tale for young men, young women, and teens.  Adults will find it exciting as well.

Footprints in the Forest by Edward S. Ellis

Thrilling tale of men of different backgrounds, on native, the other a colonist, in the forest, hunting.

Edward Sylvester Ellis (April 11, 1840 – June 20, 1916) was an American author who was born in Ohio and died at Cliff Island, Maine.

Ellis was a teacher, school administrator, journalist, and the author of hundreds of books and magazine articles that he produced by his name and by a number of noms de plume. Notable fiction stories by Ellis include The Steam Man of the Prairies and Seth Jones, or the Captives of the Frontier. Internationally, Edward S. Ellis is probably known best for his Deerfoot novels read widely by young boys, girls, and teens even today.

Captured by Apes by Harry Prentice.
Philip Garland is a wealthy animal merchant who specializes in monkeys and apes. However, he often trains his animals cruelly by flogging them, and even the narrator thinks he's excessive. The apes repay Philip for his harsh treatment of them many times over throughout the course of the book.
With apes giving speeches, this book may have been the inspiration for the "Planet of the Apes" movies.

Harry Prentice is a pseudonym for James Otis  Laughably, this title is available at Aamazon for ten dollars.

Camp Lenape on the Long Trail by Carl Saxon and Arthur Grove Day
A thrilling account of camping and a mystery once again at Camp Lenape.

Sink or Swim by Horatio Alger
An outstanding tale of intrigue, written for young men by America's most beloved writer of boys' books, Horatio Alger.