Jason Gridley has mounted an expedition to rescue David Innes from the Korsar dungeon. While in Africa to obtain a light metal for the dirigible that he will use he encounters Tarzan. He convinces him the join the expedition with his Waziri warriors.
The dirigible named the O-220 takes off from Germany and enters Pellucidar through the North Pole opening. Here Tarzan decides to do some exploring but gets lost in the unfamiliar environment. Jason leads an expedition to find him and is attacked by a pride of Saber-tooth tigers. Jason gets lost from the rest of the expedition and finds Jana fleeing capture from a hostile tribe.
What follows is the adventures of Tarzan intercut with that of Jason and Jana. Eventually they reunite and are able to free David.
This book has a lot of sentimental value for me. I was thirteen and had just moved to Elko Nevada. I had no friends and this was before the internet and video games. My mom took me down to the library that summer to find a book. I decided on this one. It had a cool name with a cover of a mammoth fighting off saber-tooth tigers. I had loved to old movies and comics of Tarzan so I thought I would give it a try.
That day I fell in love with reading. The adventure of an exotic world filled with cavemen, dinosaurs, saber-tooth tigers, pirates and snakemen captivated me that day. I spend the rest of the summer reading every book from ERB from the library. I eventually branched out to other authors. I guess fate choose that time and place with this one book. It inspired me to want to be a writer. Something that I am seriously finally pursuing in life.