Snow Crash by Neal Stephenson
Brave New World by Aldous Huxley
Broken Angels by Richard K. Morgan
so far..
He's also recommended, but hasn't forced me to read:
Ringworld by Larry Niven
The Foundation Series by Isaac Asimov
aaand a bunch of SciFi movies:
Brazil ( 1985 )
Time Bandits ( 1981 )
Blade Runner ( 1982 )
2001 Space Odyssey ( 1968 )
Planet of the Apes ( 1968 )
THX 1138 ( 1971 ) <-- By George Lucas

etc...
You should also read:
Ender Wiggin Saga by Orson Scott Card ( Ender's Game, Speaker for the Dead, Xenocide, Children of the Mind -> Ender's Shadow, Shadow of the Hegemon, Shadow Puppets. )

Nemesis by Isaac Asimov
Homecoming series by Orson Scott Card
and uhmm anything by H.P. Lovecraft even though they're really fantasy stories IMO. ( Call of Cthulu and such )