This edition contains: At the Earth's Core, Pellucidar, Tanar of Pellucidar, Tarzan at the Earth's Core, Back to the Stone Age, Land of Terror and Savage Pellucidar
This edition contains: At the Earth's Core, Pellucidar, Tanar of Pellucidar, Tarzan at the Earth's Core, Back to the Stone Age, Land of Terror and Savage Pellucidar