Would it be legal also if I had scanned it for myself only beforehand to access digitally? I also think it'd be more meaningful but the local library here gives you a form to fill if you want to donate anything so that gets me in doubt

Oh, thanks! I have some books that is occupying too many spaces and I was wondering about it, I don't know what I'd do to the physical book afterwards though, would I still be in the clear if I donated the physical book to a public library or would be better if I somehow recycle it since it's mostly paper?