Invisible Men of Mars
Edgar Rice Burroughs
Barsoom (1)
Beyond the Farthest Star
Skeleton Men of Jupiter
Barsoom (13)
Land of Terror
Pellucidar (6)
Escape on Venus
Venus (Edgar Rice Burroughs) (4)
Tarzan and "The Foreign Legion"
Tarzan (22)
Llana of Gathol
Barsoom (10)
Warlord of Mars
Barsoom (3)
Savage Pellucidar
Pellucidar (7)
The Eternal Savage
The Eternal Lover (1)
The Land of Hidden Men
The Lost Continent
Tangor Returns
Beyond the Farthest Star (2)