Ivi K
Google
It is what the users make it.
I had some books sitting at home I didn't need anymore so I was happy to find a place to donate them instead of throwing them out. When I arrived at the spot there were quite a few fat old law books (probably the only ones you can throw out as they likely are outdated) sitting in the shelf and not much else...
I hope this will change in future and people will bring more other stuff as well. You can find books in German, English, Polish...