The Caldo de Piedra Library Project is the amazing action by Kyle and Cassandra Passarelli, who are organizing activities as Job Wuj (rain of books), which they described it on their blog:
El Proyecto Biblioteca Caldo de Piedra es la asombrosa acción de Kyle y Cassandra Passarelli, que están organizando actividades como Job Wuj (lluvia de libros), que describieron en su blog: