Tanar of Pellucidar

Emperor David Innes pursues Tanar of Sari, like a son to him. Tanar is caught by pirate Korsars, taken to carnivorous underground Buried People of Amiocap isle. Tanar falls in love with Stellara, daughter of Korsar chief The Cid, stolen by fellow prisoner Jude, but must return to Innes' Empire and alert them - Emperor is imprisoned by Korsars.