Here is a list of 6 Amazing Science Fiction Books You Had to Read Twice to Understand.
Dune (Dune, #1) by Frank Herbert
From the blurb:
The Duke of Atreides has been manoeuvred by his arch-enemy, Baron Harkonnen, into administering the desert planet of Dune. Although it is almost completely without water, Dune is a planet of fabulous wealth, for it is the only source of a drug prized throughout the Galactic Empire. The Duke and his son, Paul, are expecting treachery, and it duly comes – but from a shockingly unexpected place.…
Dragon’s Egg (Cheela, #1) by Robert L. Forward
From the blurb:
In a moving story of sacrifice and triumph, human scientists establish a relationship with intelligent lifeforms—the cheela—living on Dragon’s Egg, a neutron star where one Earth hour is equivalent to hundreds of their years. The cheela culturally evolve from savagery to the discovery of science, and for a brief time, men are their diligent teachers.…
Foundation (Foundation, #1) by Isaac Asimov
From the blurb:
The Galactic Empire has prospered for twelve thousand years. Nobody suspects that the heart of the thriving Empire is rotten, until psychohistorian Hari Seldon uses his new science to foresee its terrible fate.…
Tau Zero by Poul Anderson
From the blurb:
The epic voyage of the spacecraft Leonora Christine will take her and her fifty-strong crew to a planet some thirty light-years distant. But, because the ship will accelerate to close to the speed of light, for those on board subjective time will slow and the journey will be of only a few years’ duration.…
The Invincible by Stanisław Lem
From the blurb:
In the grand tradition of H. G. Wells and Jules Verne, Stanisław Lem’s The Invincible tells the story of a space cruiser sent to an obscure planet to determine the fate of a sister spaceship whose communication with Earth has abruptly ceased.…
Blood Music by Greg Bear
From the blurb:
This Hugo and Nebula Award finalist follows present-day events in which the fears concerning the nuclear annihilation of the world subsided after the Cold War and the fear of chemical warfare spilled over into the empty void it left behind.…