The 100 Greatest Books, according to PD.com

[whatc]

Some faint memories from the wasted youth  

Deus X - Norman Spinrad
Mort - Terry Pratchett
Neuromancer - William Gibson
Software - Rudy Rucker

[Mesozoic Mister Nigel]

I'd also like to nominate Merriam-Webster's Collegiate dictionary.

[Requia ☣]

Neuromancer? Really? It did start the genre and all, but it was such a crappy novel.

[Iason Ouabache]

Oh, and The Constitution

That's more of a parchment than a book.  How about Thomas Paine's Rights of Man instead?

[Vene]

Hitchiker's Guide to the Galaxy - Douglas Adams

If you don't like this book, I officially hate you.

As for the list I just have a couple things to nominate.  I may add more later.

Catch-22, Joseph Heller
The Colour of Magic, Terry Pratchett (I'm only adding this one of the Discworld series because it was the first)

[Pope Lecherous]

The Dune books written by Frank Herbert.

Ender's Game wasn't too bad, the sequels were actually pretty awesome.

[whatc]

Neuromancer? Really? It did start the genre and all, but it was such a crappy novel.

It's been too long. I just remember liking it.

And more nostalgic crap
The Dark Elf Trilogy - R.A. Salvatore

[Faust]

Hitchiker's Guide to the Galaxy - Douglas Adams

If you don't like this book, I officially hate you.

As for the list I just have a couple things to nominate.  I may add more later.

Catch-22, Joseph Heller
The Colour of Magic, Terry Pratchett (I'm only adding this one of the Discworld series because it was the first)

Catch 22 I agree with, I really don't think TP is all that good. he is amusing some of the time but his writing isn't all that great. Once you have read one or two of his books you have read them all.

couple more:
Lolita by vladimir nabokov has an awesome melancholy writing style and a pretty tragic story.
The house of spirits by isabel allende doesn't have a great writing style but the story is incredibly well constructed, really bizarre characters.

[LMNO]

Sartre, No Exit.
Hesse, Steppenwolf.

[nostalgicBadger]

Sartre, No Exit.
Hesse, Steppenwolf.

We Can Remember It For You Wholesale by Philip K. Dick

All of Sartre's plays are pretty amazing, actually. The Flies might have been my favorite, or Dirty Hands, but the No Exit might be the most worthwhile read for "cocktail conversation" value -- not that it's any less quality than the others, but it's also the most read. Also, I've never read Steppenwolf, but I loved Siddhartha and Demian; similar quality, similar themes, but the characters and period in the latter resonated more strongly with me.

Adding:
American Psycho by Bret Easton Ellis,
Notes From the Underground by Dostoevsky,
the Secret Agent by Joseph Conrad,
Against Nature by Joris-Karl Huysmans,
the Night In Question by Tobias Wolff, but I've never read a bad collection by the man.

[Faust]

I'm reading American psycho again (stopped half way when my dad was dying, didn't get back to it).
I wouldn't say its one of the 100 greatest books but it definitely has a unique style.
I didn't mention it or any of william burroughs stuff before for the same reason, they are cool and unique but it just feels wrong to put them in lists with other kinds of writing.

[Z³]

Sartre, No Exit.
Hesse, Steppenwolf.

Hey LMNO, you ever read the Vonnegut book Wampeters, Foma, and Granfalloons? There is a section where he kind of rails against the popularity of Hermen Hesse, basically stating that Hesse was an incurable optimist and that the popularity of his books in the sixties probably led a lot of young people into bad situations.

I forget exactly how he worded it, but I'll type it all out tomorrow if you're interested.

I'm curious as to how you'd feel about it.

[Z³]

Sartre, No Exit.
Hesse, Steppenwolf.

All of Sartre's plays are pretty amazing, actually. The Flies might have been my favorite, or Dirty Hands, but the No Exit might be the most worthwhile read for "cocktail conversation" value -- not that it's any less quality than the others, but it's also the most read.

The Flies is definately my favorite, but No Exit I think has unnofficial PD.com sponsorship already. Also VALIS is probably the most 'discordian' of the PKD books, but its also my favorite so I'm probably expressing personal bias.

[rong]

Goedel, Escher, Bach - Douglass Hofstadter

[ᐂ]

Snow Crash - Neal Stephenson

We Can Remember It For You Wholesale by Philip K. Dick

I haven't read this one, but I've read Do Androids Dream Of Electric Sheep? and it was quite interesting.