could you please say if this .onion is official?

http://bookszlibb74ugqojhzhg2a63w5i2atv ... ead.onion/

When I use TOR Browser I always get the verify page and it fails (I basically cannot verify).



It happens visiting:

https://z-lib.sk
https://z-library.sk
https://z-lib.fm
https://z-lib.gd

Hi,

I would like to know where I can find more details about the personal data policy of z-lib.sk.

If I delete a book that I have dowloaded from the list of books in my account, when I check that book link it still shows I've downloaded it.

Can anyone let me know if it is possible to delete ...