Edgar Rice Burroughs

Tarzan the Invincible is a novel written by Edgar Rice Burroughs, the fourteenth in his series of books about the title character Tarzan. The novel was originally serialized in the magazine Blue Book from October, 1930 through April, 1931 as "Tarzan, Guard of the Jungle."

Somewhere in South America, there is a plateau; and roaming in its forests are dinosaurs. Only one man has ever been there, and his reports are so astonishing that no-one is prepared to believe him; except the extraordinary Professor Challenger. He decides to take a trip to prove beyond doubt that this lost world …