- Battle Circuit
- The Last Battlefield
- The Invaders from Outside
- The Red Tide
- The Mind Snatchers from Mercury
- The Flying Saucers from Mars
- The Green Peril from Vega
- Danger from Venus
- Invaders From Titan
- The Invaders on the Threshold
- The Invaders from Below
- The City on the Moon
- The War in the Void
- The Star Behemoth
- Earth, the Outworld
- Battle for the Earth
- The Cosmic Conspiracy
- The Galactic Federation
- The Interstellar War
- The Final Battle
- The Cosmic Conflict
- The Eternal War
- The End of the Universe
- The Beginning of the Universe