Pellucidar (Pellucidar, #2)

A Sequel To At the Earth’s Core
American David Innes narrates return to exotic, savage land below the Earth crust, old pal Abner Perry, female Mahar, an untamed wilderness where the sun never sets. He seeks beloved Beautiful Dian, torn away by trickery. He crosses the Pellucidar, the Land of Awful Shadow under a pendant moon, encounters prehistoric beasts & strange peoples.