@alibarisaktas

Yeah, it's a bit useless to add filters now, when you only have 8 books.

It's noble of you to only add free books, but I would suggest you might want to reconsider that.
The quality of some commercial books is just so much better than any free book & you'd be able to make some money out of it through providing Amazon affiliate links.

I get it if you're completely against that, but I don't think most people would be opposed to it. Just saying...