Ordine di lettura
1
Conquest of the Amazon
1949
2
World Beneath Ice
1949
3
Lord of Atlantis
1949
4
Triangle of Power
1950
5
The Amethyst City
1951
6
Daughter of the Amazon
1952
7
Quorne Returns
1952
8
The Central Intelligence
1953
9
Parasite Planet
1955
10
The Cosmic Crusaders
1955
Altro di Robert Greene
Through My Eyes
9 libri
Johnny Merak
8 libri
Steve Carradine
6 libri
Dark Armageddon Trilogy
3 libri
A History of Space Exploration
2 libri
Arkladian Chronicles
1 libro