Chips was indeed an error I shouldn't have made and have now corrected, so thanks for that.
Rightly or wrongly I see the story as being set in a town/city in a more rural part of the US. Adam has always been portrayed as a very intelligent kid, so as to hopefully explain the style of narration and dialogue. With no interest in sports or any friends, I see him as having been a voracious reader in his earlier life.
Did think what happened to Troy was sexual assault rather than rape though. Had it been that I'm sure it would have taken much longer for him to get back to anything like normal.
Appreciate the comments.