Foundation series by Isaac Asimov
If This Goes On— by Robert A. Heinlein
Methuselah's Children by Robert A. Heinlein
Nightfall by Isaac Asimov
Slan by A. E. van Vogt
The Black Star Passes by John W. Campbell, Jr.
The Cold Equations by Tom Godwin
The Drowned Giant by J. G. Ballard
The Legion of Time by Jack Williamson
The Roads Must Roll by Robert A. Heinlein
The Weapon Shops of Isher by A. E. van Vogt
Who Goes There? by John W. Campbell, Jr.