The first ones to come to mind:
The Forever War, Joe Haldeman
A Princess of Mars, Edgar Rice Burroughs,
Enders Game
The Foundation Trilogy, Isaac Asimov
Fahrenheit 451, Ray Bradbury
Starship Troopers, Robert A Heinlein
I, Robot, Isaac Asimov
The Time Machine, H G Wells
Great list, Nachum!
Also great authors, you are right, man I am forgetting a lot of great ones...
Isaac Asimov,
Ray Bradbury and
Robert A Heinlein