Have you noticed all the Little Free Libraries popping up in people's yards everywhere? They're usually shaped like miniature houses, set on a post like a mailbox, with big doors on the fronts and books inside. The idea is to take a book to read, and leave a book for someone else, so that the library always stays replenished.
They're becoming quite common in the Denver Metro area, especially in some of the trendier areas, but I've been mystified to hear from time to time about people hating on them. Then I saw this article.