SOTDP appeared Jan 1 2004 and was taken off the book list in March 2008. If you click the links you see the gateway link and all of the translations. One is in German.
From what I can find, it looks like Rudolph Berger translated works into German MANY years ago, like so many years ago that I have to wonder if he was still alive when this was translated. I downloaded the German version of SOTDP but didn't recognize his name within the text. Hinky.
Also, it looks like esoteric site went belly up in 2014.
Also, Rudolph Berger is not on the passenger list posted by Sir ell aye ell.
https://books.google.com/