http://www.bookcrossing.com/home

"What is BookCrossing, you ask? It's a global book club that crosses time and space. It's a reading group that knows no geographical boundaries. Do you like free books? How about free book clubs?. Well, the books our members leave in the wild are free... but it's the act of freeing books that points to the heart of BookCrossing."

Hum, ainda me inscrevo.