Zur Zeit ist kein 4 Band auf deutsch vorgesehen. Siehe Facebook von Henry Neff

Henry Neff schreib in Facebook: ..at the moment the German publisher does not intend to translate books 4 and 5 into German. While that could conceivably change at some point, that's where things currently stand. If you would really like to see books 4 and 5 in German, I'd encourage you to rally other German-speaking fans of the series and write the publisher. If enough people contact them, perhaps they'll change their minds. - Also müssen wir etwas tun, wenn wir den 4 und 5 Band lesen wollen.