Psychohistorical Crisis by Donald Kingsbury: imagine a wearable computer, brain interfaced, that you grow up with. Now imagine it being taken away, and destroyed, and relearning to read, with your eyes and animal brain. A non-authorized sequel to Asimov's Foundation series. Better (imho) than the original.
If you've read the Foundation trilogy, you'll have some more context, but if you're not too fazed by highly science fictional settings (i.e. you've read a fair amount of science fiction) you should be OK.
