This list isn't in order- well, the top three are my top three.
We the Living, Ayn Rand
Stranger in a Strange Land, Robert Heinlein
(Derek and I argued for
this being 'classic literature' in our Critical Theory class with
Trimbur.)
The Color Purple, Alice Walker
1984, George Orwell
Snow Crash, Neal Stephenson
Player Piano, Kurt Vonnegut
Ender's Game, Orson Scott Card