
1) American fantasy novel
Found on
https://www.crosswordclues.com/clue/pellucidar

Pellucidar is a fictional Hollow Earth invented by Tarzan creator Edgar Rice Burroughs for a series of action adventure stories. In a notable 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 frie....
Found on
http://en.wikipedia.org/wiki/Pellucidar
No exact match found.