The Malignant Entity
Otis Adelbert Kline
Dr. Dorp (1)
Maza of the Moon
The Prince of Peril
Grandon (2)
Spawn of the Comet
The Man from the Moon
The Thing That Walked in the Rain
Call of the Savage
Jan of the Jungle (1)
Jan of the Jungle (The Call of the Savage)
The Metal Monster
The Port of Peril
Grandon (3)
The Swordsman of Mars
Swordsman of Mars (1)
The Outlaws of Mars
Swordsman of Mars (2)
A Vision of Venus
Revenge of the Robot
Stolen Centuries
Prince of Peril
Jan of the Jungle