Er probably Das Kapital, Catch 22, Brave New World, Fear and Loathing, The Road to Wigan pier,Dispatches by Mike Herr,On The Origin of Species.
My folks always had piles of books everywhere and I read voraciously, still do really, even walking around town I'll take a book to read whilst I'm walking.
I'd say that the ones I've mentioned were probably the ones, for right or wrong that helped form my opinions and biases the most anyway.