Conquest Over Time
Michael Shaara
Trees Are Where You Find Them
Arthur Dekker Savage
Stand by for Mars!
Carey Rockwell
Tom Corbett Space Cadet (1)
A Filbert Is a Nut
Rick Raphael
Mr. Chipfellow's Jackpot
Dick Purcell
The Knights of Arthur
Frederik Pohl
The Day of the Boomer Dukes
Pythias
Temple Trouble
H. Beam Piper
Paratime Police (1)
Dearest
Last Enemy
A Planet for Texans
H. Beam Piper & John J. McGuire
Ace Double (299)
As Long As You Wish
John O'Keefe
PRoblem
Alan E. Nourse
Letter of the Law
Gold in the Sky
Contamination Crew
Second Sight
The Native Soil
The Coffin Cure