What is Free Little Library? The concept is: Take a Book, Give a Book.
It's a national movement whereby volunteers build a small library/creative bookshelf (out of wood, an old refrigerator, etc) then stock it with used books as a way to share literary resources and build a sense of community with those in the neighborhood.
Your library can be displayed infront of your home, inside your favorite coffee house, or any local space that is willing to permit your collection of free books.
For more info and a map of Free Little Libraries near you see: