I was reading this article yesterday which I got linked to from a post on Facebook. If you wish, you can read the full article here.
Imagine if you will, a miniature library situated on a poll standing outside of your house. Inside lies various books that you've left there free for the taking. "Take one, leave one" are the simple rules. This was the idea that sparked Todd Bol and now these little libraries can be found in more than 24 states and a few countries around the world.
There's a website can visit and learn more about the project.
http://www.littlefreelibrary.org/ This is so cool, I'm seriously considering doing one for my neighborhood.