Back to the Stone Age

"Back to the Stone Age" is a science fiction novel by Edgar Rice Burroughs, published in 1937. It is part of the Pellucidar series, which follows the adventures of David Innes in a prehistoric world located within the Earth's core. In this installment, Innes and his companions find themselves transported back to Pellucidar, where they must navigate the dangers of the primeval landsc...