Biblioburro: A True Story from Columbia by Jeanette Winter (2010)
Luis loves to read, but soon his house in Colombia is so full of books there's barely room for the family. What to do? Then he comes up with the perfect solution--a traveling library! He buys two donkeys--Alfa and Beto--and travels with them throughout the land, bringing books and reading to the children in faraway villages. Beautiful!