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