Pellucidar Series
(8 books)


Books in the series:
1.  
At the Earth's Core (1914)

2.  
Pellucidar (1915)

3.  
Tanar of Pellucidar (1928)


5.  
Back to the Stone Age (1937)

6.  
Land of Terror (1944)

7.  
Savage Pellucidar (1941)

8.  
Mahars of Pellucidar (1976)