Little Free Library

Here is a wonderful little library movement, started in Minnesota.  Build your own little library or adopt one.
It is called LittleFreeLibrary and it's mission is: 

To promote literacy and the love of reading
 by building free book exchanges worldwide.
To build a sense of community as we share
 skills, creativity and wisdom across generations. 
To build more than 2,510 libraries around the world--more than Andrew Carnegie!