It's called the "Little Free Library" and the idea has spread rapidly over the last few years. These are little boxes shaped like small houses that contain books that anyone can use.
How does it work? Anyone can walk up to these libraries and look through the books. If you find a book that you like, take it and leave a book in exchange. People love these libraries and the books change every day!
The "Little Free Library" was started by Todd Bol and Rick Brooks in 2009. Since they created the first one, over 5,000 libraries have appeared around the world (see the map). You can either create your own library or order one from their website. These Little Free Libraries have created a sense of community and have encourage people to read!
And that's what's good,