Our local library have regular book swap days. You just bring books you don't want to keep and look if there's something else you would like instead. You don't have to give any to take any. Last time there was a full set of 1001 nights. A full set of 16 books. I think they might even have been illustrated.

I didn't take them. WHY did I not take them?!??? Regretted it as soon as we were back in the car on the way to our next errand that day.

If they are still there at the next book swap, it's a sign! (I fear my odds aren't very good, though)