The Moon Is a Harsh Mistress
Robert A. Heinlein
Toys for Debbie
David A. Kyle
Tiger Green
Gordon R. Dickson
Origin of Species
Robert F. Young
Moon Duel
Fritz Leiber
Under Two Moons
Frederik Pohl
Research Alpha
James H. Schmitz & A. E. Van Vogt
Raindrop
Hal Clement
Meeting on Kangshan
Eric Frank Russell
The Replicators
A. E. Van Vogt