Pellucidar Edgar Rice Burroughs

In this sequel to At the Earth's Core, return to the world of Pellucidar--an exotic, savage land at the center of the Earth, an untamed wilderness where the sun never sets. When American explorer David Innes first discovered Pellucidar, he fell under the spell of the strange world, earning the respect of many, the undying hatred of a few, and the love of the beautiful Dian. Torn from her arms by trickery, Innes vows revenge and returns to the Inner World to seek his lost love.