Yes, it is rare. It went out of print almost three years ago now. I believe the company closed down.
Oh. I ignorantly assumed it was by the same people that did Carc. Interesting.
Well, if I ever see another I'll snag it I suppose; maybe try to get it to somebody on here who would want it. I'll keep my eyes open now.
It was published by a company called Überplay Entertainment under their Inspiration Games imprint (which specialised in games for the religious market). It was still designed by Klaus-Jürgen Wrede. I personally think that AotC is the best version of vanilla Carc there is. For those that haven't acquired it, if you see a copy, do get hold of it.