Feed, by M.T. Anderson

This story is set in the future, where large corporations have taken advertising and consumerism to extremes. Humans have "feeds" implanted in their brains almost from birth, feeds that are part Internet, part advertising. The ability to read and write and even to think for ones self has been almost completely obliterated. Titus, who narrates the story in his frighteningly simple voice, is leading a contented life of partying and shopping until he meets Violet. Violet didn't get her feed until she was in grade school, thus her brain retains developed thought processes independent of the feed. Violet is doing the unheard of - she is fighting the feed. Through Violet, Titus begins, dimly, to realize that his thoughts are not his own but are implanted for commercial purposes.

This is scary reading, especially in the light of current brain research that is working on identifying a person's thoughts through brain scans. If your thoughts can be scanned, is it a big leap till can they be altered? Today Channel One (brought to you by Coca Cola) - tomorrow, who knows.