Tarzan and the Valley of Gold
This novel is based on the screenplay for the film of the same name.
Set in South America this book starts in the Bullring of Mexico and ends up heading to the Jungles of Brazil where Tarzan gets involved in the Haunts of an Ancient Incan city.
Fritz Leiber
Fritz Reuter Leiber, Jr. (1910–1992) was an American author of fantasy, horror, and science fiction. The son of a pair of Shakespearian actors, Leiber was also an actor, expert chess player, and champion fencer. Born in Chicago in 1910, Leiber spent his youth touring with his parents' theater company. He graduated with honors in philosophy from the University of Chicago in 1932. Leiber married Jonquil Stephens in 1936. In 1938, their son Justin was born. After Jonquil's death in 1969, Fritz Leiber moved to San Francisco, where he died on September 5, 1992.
Tarzan (other novels)
Tarzan (other novels) consists of 5 total books. The current recommended reading order for the series is provided below.
Main series Tarzan