Looking for THAT story

For my birthday I urgently remembered THAT story and realized it was time for yet another re-read.  You know the one, that story...the one that encompasses all of your senses and moves into the part of your brain you can never forget (except for the Title/Author Name it seems), and you KNOW you should remember the author AT LEAST because they are an incredible beast in the writing department.  

Anyway... the plot:

Atlantis is invaded (not by Genii; pretty sure this story is BG) and everyone; EVERYONE is taken to another world and SOLD as slaves and if not for Carson only  a very few would have survived.  Although we see Rodney and Radek's circumstances first, John is the first to show (heh) his face.  This is a pretty old story, Season 1, I think so the chances of old hands having read this multiple times is high, and new folk finding it pretty slim.

I've been looking for this as a Birthday reread.  My birthday was on Monday, so I'm pretty desperate: Help!