Series: Pellucidar
by Author Edgar Rice Burroughs
Book
Tarzan at the Earth's Core (Tarzan, #13) (2006)
It's clear at this point that Burroughs was tired of writing about Pellucidar. Though his writing evinces more and more social reflection about the nature of man and the wilderness, Tarzan at the Earth's Core has lost some of the wild swashbuckling joy of the earlier books in the series, resorti...
Book
Pellucidar (2002)
In the previous book, At The Earth's Core, David Innes has been tricked. He ends up back on the surface of our own world, his beloved wife Dian replaced by a vile, winged-crocodile like Mahar. Determined to once again return to the underground world of Pellucidar and get his wife back, he turns h...