Silvana Aquino writes [es] on Infotecarios about BookCrossing, BC, the practice of leaving a book in a public place to be picked up and read by others, who then do likewise.

BC has become a an increasingly popular phenomenon, as right now there are two millions of registered users, known as BookCrossers, who have released about tne million books in 132 countries. Through these free books that go beyond barriers of time and space, the intention is to turn the world into a global library.

And then, Silvana tells us a Latin American experience:

So, there is the B Day [es] with the aim of “atttracting attentios about books circulating as objects, as idea carriers, as cultural assets, this is the main idea of this proposed action.” This practice is carried out every September 21 since 2010 in Argentina, Chile, Colombia, Mexico and Peru [es] and year by year, more countries from other regions have started to participate.