The idea of the Little Free Library caught on and became a nonprofit organization. There are now 50,000 registered Little Free Libraries worldwide. They can be found in the UK, India, Canada, Japan, Netherlands, Mexico, Brazil, Australia, New Zealand, and many more countries.
You can purchase a book box or get instructions on making your own at littlefreelibrary.org. The site contains all kinds of information about how to get involved. What a great way to share books!