a beautiful critique of capitalism is Guy Debord's "The Society of the Spectacle". he was part of the situationist international art movement in France in the 60's. it talks about alienation and mental oppresion capitalism creates.
Also, a great novel is Harriet E. Wilson's "Our Nig". it is actually the first novel written by an african-american women. great piece of work.
Anything by Howard Zinn or Noam Chomsky is very enlightening and readable. For Zinn i suggest:"A People's history of the United States", "The Zinn Reader", "Declarations of Independence", "The Politics of History", "The Southern Mystique", "You can't be neutral on a moving train". For Chomsky i suggest:"Manufacturing Consent","Profit over People","The Chomsky Reader","Class Warfare". For Feminist stuff: anything by Emma Goldman, bell hooks,Simone Beauvour's(sp?)"The Second Sex", Volarie Solanas's "SCUM Manifesto"-this is pure genuis-there is so much else, but i can't remeber right now.
"if voting could change anything, it would be illegal"-me