Others that every Science Fiction reader should own...
The Mote in God’s Eye (A must for “hard” SF readers)
The Moon is a Harsh Mistress.
A Canticle for Lebowitz.
Forever war (Yes, liberal as hell, but a great book)
The Martian Chronicles
On The Beach (Again, liberal)
Atlas Shrugged
A Clockwork Orange
Rendezvous with Rama
Enders Game
Hitchhikers Guide to the Galaxy
Brave New World
Good list, I would add the Old Man’s War series to it.
Dune
Foundation Trilogy+
1984
A Canticle for Lebowitz.
The Martian Chronicles
On The Beach
Atlas Shrugged
I, Robot (collection)
Enders Game (half way - thought it was boring)
Brave New World
Alas Babylon