It's The Price of Freedom

The backcover of the novel, kindly scanned and sent in by Markus Steinkamp, confirms that Der Preis Der Freiheit is indeed The Price of Freedom, even though a few things indicated otherwise. The title of the next German novel up for release, Die Bedrohung, suggests it is False Colors. But the German translations have followed the original publishing order this far, so it could still be Action Stations. Only time will tell. For now, here's that backcover.