At the Earths Core,by Edgar Rice Burroughs.

When David Innes and his inventor friend Abner Perry pierced the Earths crust in their Iron Mole, never did they expect to find a fantastic inner world of eternal daylight!

A world where prehistoric monsters still live and battle with cave men and women against and even more inhuman master!

At The Earths Core keywords: at the earths core, e-book, e-novel.