<p>At the Earth's Core is a fantasy novel by Edgar Rice Burroughs, the first in his series about the fictional "hollow earth" land of Pellucidar.<br>The author relates how, traveling in the Sahara desert, he has encountered a remarkable vehicle and its pilot, David Innes, a man with a remarkable story to tell.<br><br>David Innes is a mining heir who finances the experimental "iron mole," an excavating vehicle designed by his elderly inventor frie...