[Stalker]

Stanislaw Lem
Solaris
Edem
Summa Technologia
Arkady & Boris Strugatsky
Roadside Picnic
Beetle in the anthill
Inhabited Island
Hard to be a God
Alfred Bester
The Demolished Man
Tiger! Tiger!
Isaac Asimov
The Gods Themselves
Foundation
Robert A Heinlein
Starship Troopers
Stranger in a Strange Land:
Alfred van Vogt
The Voyage of the Space Beagle: A Harvest of Stars,
Poul Anderson
Time Patrol series
Frederick Pohl
Gateway
Beyond the Blue Event Horizon
Heechee Rendezvous
The Annals of the Heechee
Walter M Miller, Jr
A Canticle for Leibowitz
Philip K Dick
Ubik
The Man in the High Castle
Do Androids Dream of Electric Sheep
Francis Carsac
Robinsons of the Space
Escaping Earth
From nowhere
Larry Niven/Jerry Pournelle
The Mote in God's Eye
Hal Clement
Mission of Gravity
Daniel Keyes
Flowers for Algernon
David Brin
Startide rising
The Uplift War
Barry B. Longyear
Enemy Mine
John Wyndham
The day of the Trffids
Philip J. Farmer
River World
Still, the above list is far from being full.