Looking for recommendations in Slavic’s books.

Hallo!

I really like slavic culture and literature, mostly I've read Russian literature, but I enjoyed some czech, polish and romanian literature. So I'm looking for clasic books of these places, like The Good Soldier Sveijk of Hasek or the work of Milan Kundera.

Also, I have to repeat myself, I'm mostly interested in the clasic literature of these places. Thanks for your attention and recommendations.