Keith Laumer
Greylorn
H. Beam Piper
Oomphel in the Sky
Jack London
The Iron Heel
Andre Norton
Storm Over Warlock
Robert Silverberg
Starman's Quest
Edwin E. Slosson
Easy Lessons in Einstein
Thomas Gilbert Pearson
The Bird Study Book
Garrett P. Serviss
Edison's Conquest of Mars
H. Beam Piper and John J. McGuire
Lone Star Planet
Edward Bellamy
Looking Backward: 2000-1887
Titus Lucretius Carus
On the Nature of Things
Edwin L. Arnold
Gulliver of Mars
Arabella Buckley
The Fairyland of Science
M. M. Pattison Muir
The Story of Alchemy and the Beginnings of Chemistry
Poul Anderson
Security
Theodore Roosevelt
Through the Brazilian Wilderness
E. E. Smith
Spacehounds of IPC
Jane Andrews
The Stories Mother Nature Told Her Children
Arabella B. Buckley
Birds of the Air
James Schmitz
Legacy
Lester del Rey
Victory
H. Beam Piper
The Edge of the Knife
David Lindsay
A Voyage to Arcturus
H. Beam Piper
Little Fuzzy
