The Pirates of Zan
Murray Leinster
The Fourth "R"
George O. Smith
The Mutant Weapon
Med Service (2)
Starship Troopers
Robert A. Heinlein
Trader to the Stars
Poul Anderson
Nicholas Van Rijn (2)
Battle for the Stars
Edmond Hamilton
Cities in Flight
James Blish
Cities in Flight (1)
Dune
Frank Herbert
Dune (1)
Skylark DuQuesne
Edward E. Smith
Skylark of Space (4)
The Weapon from Beyond
Starwolf (1)
Restoree
Anne McCaffrey
World of the Starwolves
Starwolf (3)