Two of the best known and successful German contemporary authors are not German native speaker.

Yes, it is. I can do it!

Thanks for your respond))) I really have problem using the preposiitons with the right cases and genders. The think making the learning harder is the fact that Russian nouns' genders are not the same as german one's. i.e. the girl in German is Neutrum. I also have problems choosing the right Kursbuch. I wish someome experienced could help me with the choice of a book. there are so manz of them, like Schritte Int., Temen Neu Aktuell and so on.

I hope so :) Anyway, I will continue working hard to do my best in German. Don't give up!

Of cause! And also for foreigners. I met many foreigners who spoke german very very well, almost like or even exactly like a native. And they learnt german as an adult! So, nothing is impossible! :D And all well educated germans speak their language with the correct cases. The less educated have their problems sometimes I admit. But every german uses the right genders. We grow up with them. :)