Pellucidar (Serapis Classics)

Pellucidar is a fictional Hollow Earth invented by American writer Edgar Rice Burroughs for a series of action adventure stories. In a crossover event between Burroughs' series, there is a Tarzan story in which the Ape Man travels into Pellucidar. The stories initially involve the adventures of mining heir David Innes and his inventor friend Abner Perry after they use an "iron mole" to burrow 500 ...