Printed in the sleeve note is states: "This is for the stations before and after sleep. Headphones and darkness recommended." Rygg adds, “Darkness is always fascinating, as well as the great void. It doesn’t matter under which aesthetic circumstances this void appears. It is always there and that was important for us to realize on "Perdition City": the void is even over the voice. (…) It is funny you call us criminal alchemists. Indeed in our lyrics there are enough criminal and alchemical aspects, or fascinating borderline topics, to be more concrete. That all takes place in the dead city, or better: in a centre, an imagined location of nowhere and nothing.”