115 books • 12 series
Book #3: Galaxy Mission
Book #7: Outlaws of the Moon
Book #7: The Magician of Mars
Book #1: Outside the Universe
Book #2: Crashing Suns
Book #4: The Haunted Stars
Book #7: Doomstar
Book #1: The Weapon from Beyond
Book #2: The Closed Worlds
Book #3: World of the Starwolves
Book #10: The Chronicles of the Star Kings
