The Fiction of Edgar Rice Burroughs, Part IV: The Hollow Earth and Pellucidar
Above are my Edgar Rice Burroughs Pellucidar books. Tarzan at the Earth’s Core goes with this series as well, although I included it in Part II of this series, with my Tarzan collection. In these stories, Pellucidar is a hollow area at the center of the Earth. There are openings into it at the North and South poles, but in the initial book, At the Earth’s Core, an American named David Innes reaches the interior by riding inside a giant…