At the Earth’s Core, published in 1914, is the first of a series of science fiction novels written byEdgar Rice Burroughsset inside a hollow earth with a central “sun,” a land called Pellucidar. However unlikely this scenario, it allowed Burroughs free play to create heroic adventures in yet another alien environment in addition to his fantastic version of Mars in hisMartian series.
The story’s hero, David Innes, is recruited by an...