Tarzan at the Earth's Core - Burroughs, Edgar Rice

The American explorer and emperor of Pellucidar, David Innes, has been captured by the deadly Korsar pirates. Picking up on the desperate cries for help emanating from Pellucidar, Jason Gridley brings the message to the only person who can help, Tarzan of the Apes. This is the fourth work in the "Pelludicar" series from the creator of "Tarzan".