They're called Little Free Libraries and one recently showed up in Maryville.
The Little Free Library is an idea that's growing around the globe.
It allows anyone to come take a book or leave a book.
Sam and Andrea Mason have had their Little Free Library posted at their home for a couple weeks and they say the feedback has been great.
"We knew that we would have a good response just because there are so many people that read to their children and have their children read to them," said Andrea.
The Masons have nearly 400 books available.
Sam says some people are timid at first about the idea of just dropping by and grabbing a book.
"We want people to understand that you don't need permission. You don't need to knock on the door, just come by and help yourself," he said.
Unlike the controversy the free library caused in Leawood, Kansas when the city forced a young boy to remove his little library, the Masons says they City of Maryville, along with businesses, are in full support.
"It's been a community project," Sam said. "The shingles were donated by a local lumber yard. I went ahead and checked with the code enforcement department and the City of Maryville to make sure that we weren't violating any kind of city ordinances and they said they drove by and looked at it and said 'yeah that's going to be fine'."
Leawood's city council unanimously approved a temporary exemption for the little library on Monday.
Andrea hopes the idea not only brings families together in Maryville but also encourages them to read more.
"Any opportunity that I have to put a book, whether that be for information or for enjoyment, in the hands of children and young adults, and family and friends that really makes me feel good," she said.
The Masons say they have plenty of books for children available but are still in need of donations for young adults.
Click here for more information on how to start your own Little Free Library.