A Princess of Mars
At the Earth's Core
Back to the Stone Age
Land that Time Forgot
Pellucidar
Synthetic Men of Mars
Tarzan and the Jewels of Opar
Tarzan of the Apes
Tarzan the Terrible (#8)
Tarzan the Untamed (Book #7)
Tarzan's Quest
The Beasts of Tarzan (Classic Ace SF, F-203)
The Chessmen of Mars
The Gods of Mars
The Lost Continent
The Mad King
The Outlaw of Torn
The People that Time Forgot
The Return of Tarzan
The Warlord of Mars #3