I binged watched season one. Can't wait for season 2. Absolutely loved the music score.
I was confused about this based on IMDB showing seasons 1&2 already out and Netflix only showing season 1. Apparently Netflix combined seasons 1&2 into "one" season. Episode 9 is Season 2, episode 1.
So you (and me) are waiting for season 3.

I'm up to episode 10 and liking it more and more. So well done. I actually just downloaded the first of the books to my Kindle in the original kraut. It will be slow reading as I've been letting my kraut slip away, but good reading practice to refresh myself with something of great interest. Reviews have said this is one of the most historically accurate dramas produced regarding the Weimar Republic and the political goings on at the time.
Also those "revolving" elevators in the Castle are a kick. I've not seen that before.