From The Guardian Techology blog. Only 132 people voted so there is much room for debate.
The Top 20 Geek Novels since 1932. Not sure what is a geek novel exactly, but i've read most of them.
The ones i have read are highlighted.
1. The HitchHiker's Guide to the Galaxy -- Douglas Adams
2. Nineteen Eighty-Four -- George Orwell
3. Brave New World -- Aldous Huxley
4. Do Androids Dream of Electric Sheep? -- Philip Dick
5. Neuromancer -- William Gibson
6. Dune -- Frank Herbert
7. I, Robot -- Isaac Asimov
8. Foundation -- Isaac Asimov
9. The Colour of Magic -- Terry Pratchett
10. Microserfs -- Douglas Coupland
11. Snow Crash -- Neal Stephenson
12. Watchmen -- Alan Moore & Dave Gibbons
13. Cryptonomicon -- Neal Stephenson
14. Consider Phlebas -- Iain M Banks
15. Stranger in a Strange Land -- Robert Heinlein
16. The Man in the High Castle -- Philip K Dick
17. American Gods -- Neil Gaiman
18. The Diamond Age -- Neal Stephenson
19. The Illuminatus! Trilogy -- Robert Shea & Robert Anton Wilson
20. Trouble with Lichen - John Wyndham
Not a bad list, i guess you could go on forever.
The first four, who can complain really. I'm with the geeks on those ones.
I just finished reading "The Salmon Of Doubt" the bits and pieces from Adams computer after he died. Wanted to cry....
Ian M Banks- Player of Games, Turn To Windward, Use of Weapons.
Take your pick, they all totally rock.
Terry Pratchett- i love all his stuff, Colour of Magic was his first Discworld novel and started a great series, so maybe thats why its there. Its good but i really like alot of his later books, the characters, world and plot are more fleshed out, more interesting. Who doesn't love Granny Weatherwax, The Patrician, Vimes.......
Neal Stephenson and Neal Gaimen...sigh. I'll have those guy's babies anytime.
Other authors that come to mind that could be there- David Brin, Dan Simmons, Connie Willis, Michael Marshall Smith, Cordwainer Smith, Verner Vinge.
Plus many others i'm sure you good people could suggest.