Tonight while looking for free or cheap books online to distribute for the project, I came across this site:
where you can actually put a code on your book before letting it free, track it to see where it goes, and who reads it. This will only work if the finders log onto the Book Crossing website and input the required info. Hey it's worth a shot to see where the books end up!
I love this idea as it turns the world into a public library.