This is probably my favourite book ever. I borrowed it just on the premise of computers being interfaced with the brain but what I read far excelled anything I had ever imagined possible so I bought it, and read it several more times.
The book is a story of a girl's coming of age, a cyber-mystery, an ineresting look at future technology's impact on society, and a classic story power/domination struggle. C. S. Friedman does an excellent job of weaving several sub-plots into an overall great book.
If you enjoy reading at all then you'd probably find something to interest you in "This Alien Shore"