I readthis YA sci fi about 10-15 years ago.. It was about a future world where everyone lived in this dome and had these computer like things on thier back that told them everything. This boy discovered some nasty plot and escaped to the outside thinking he would die because it was supposed to be post apocolyptic outside of the city dome but it wasn't. Now I can't remember the whole plot or the whole story line, so Iguess I'm not very helpful. Any ideas?