There's a small movement trending across the US called "Little Free Library". People are putting up small boxes in their yards or other public places with the idea of take-a-book, leave-a-book.
There have been several news articles about it recently.
http://www.littlefreelibrary.org/
http://www.usatoday.com/news/nation/...oks/53260328/1
http://www.post-gazette.com/stories/...square-646153/