For a general description, refer to Deutsche - warum nicht? - Serie 1 of this course .
Deutsche - warum nicht? - Serie 4 is a continuation of the course, “German - why not?”. It is aimed at beginning and intermediate learners.
Note that some of these lessons, like in Deutsche - warum nicht? - Serie 3 , are getting rather lengthy and more difficult.
Hi Neal,
Just noticed S4 series only have a few lessons up. The rest will eventually come up? I’m slowly make my way to S2 and S3 so thought I raised it in case you have some time and can add some more lessons in. Thanks as always.
I am not yet sure if I will be able to complete this. I have to say, after almost 4 years you are the first person to inquire. I will think about this over the next few weeks. I have all of the lessons, but not the audio right now, so I’ll have to see if I can even find it. Would you be interested in helping? I was pretty involved in studying German at the time, but moved on to Greek and French.
No worries. No real rush anyway. I still have plenty of study materials to do plus I don’t think I can study as much as I usually do going forwards. Judging from the amount of work you put in in the previous 3 series one can see you were very involved in German 
At the moment, I still have S2 and S3 to finish off so if I participate in the S4 work, it would be earliest mid yr. next year and it would be limited as my spares time is drying up fast. I sure can add the vocabs and audios if I can get them from forvo. If it’s required original recording manipulation as you have done a great job in, I wouldn’t be able to do it due to time constraints and lack of powerful enough equipments.
By the way, if you still learning German, have you check out the new Nico series from DW? You probably passed B1 level but if you interested… B1 level vocab work?