Triumph
Philip Wylie
The Disappearance
Pirates of Venus
Edgar Rice Burroughs
Carson Napier Venus (1)
Lost on Venus
Carson Napier Venus (2)
Tarzan at the Earth's Core
Pellucidar (4)
Tanar of Pellucidar
Pellucidar (3)
Pellucidar
Pellucidar (2)
Back to the Stone Age
Pellucidar (5)
The Song of the Axe
Paul O. Williams
The Pelbar Cycle (6)
The Dome in the Forest
The Pelbar Cycle (3)
The Breaking of Northwall
The Pelbar Cycle (1)
An Ambush of Shadows
The Pelbar Cycle (5)
When Worlds Collide
Philip Wylie & Edwin Balmer
When Worlds Collide (1)