What happened to 'Concern'? The next in the series?

I just read all four that are currently up on AFF, but I don't have an account there, so I decided to review here. And I think you should continue. But if the next in the series hasn't shown up in...four years, I guess it's not coming, so I won't be expecting.

Oh, well.

Freaky..that was a side of Colin i have never read about. Keep up the good work!
Juls