Plot:A huge burrowing machine tunnels out of control at ferocious speed, cutting clean through to the center of the earth, to the twilight world of pellucidar. Once there, Dr. Perry and David Innes are threatened by half human creatures, lizard-like birds, and man-eating plants.

Plot:A shipping disaster in the 19th Century has stranded a man and woman in the wilds of Africa. The lady is pregnant, and gives birth to a son in their tree house. Soon after, a family of apes stumble across the house and in the ensuing panic, both parents are killed. A female ape takes the tiny boy as a replacement for her own dead infant, and raises him as her son. Twenty years later, Captain Phillippe D'Arnot discovers the man who thinks he is an ape. Evidence in the tree house leads him to believe that he is the direct descendant of the Earl of Greystoke, and thus takes it upon himself to return the man to civilization.

Plot:The Tarzan story from Jane's point of view. Jane Parker visits her father in Africa where she joins him on an expedition. A couple of brief encounters with Tarzan establish a (sexual) bond between her and Tarzan. When the expedition is captured by savages, Tarzan comes to the rescue

Plot:Tarzan returns to his homeland of Africa to save his home from destruction.

Plot:A scientific expedition happens to discover that gold exits on Tarzan’s escarpment. The villainous Medford and Vandermeer kidnap Jane and Boy to extort from Tarzan the location of the gold. Everyone is captured by wicked natives. Tarzan and his elephants rush to the rescue.