209 books • 10 series
1,000-Year Voyage
Thrilling Wonder Stories February 1937
Zagribud (Liners of Time, #2)
Earth Divided
Chameleon Planet
The Golden Amazon
The Gold Bonanza
Ghost World
Standstill Planet
Skeleton Pass
Stone Of Courage
Earth's Mausoleum
Duel with Colossus
Duel Of The Outlaws
The Eclipse Express
The Renegade Star
The Sun Makers
The Catalyst (Vargo Statten)
Exit Life
The Grand Illusion
Moons For Sale
The Hell Fruit
The Petrified Planet
Wealth of the Void