Just finished reading Brave New World. I know that it's compared a lot to 1984, seeing as both are dystopian futures which heavily feature brainwashing, but I find that while 1984 tries to scare the reader with the horror of the totalitarian state's thought police, Brave New World is unsettling in a much more subtle, perhaps more deep-seated way. The only thing worse than losing your freedom is not wanting it to begin with.
Reading this book has been the most intellectual stimulation I've had in recent memory, perhaps all the way from before NS.