Bookcrossing was created in the United States in 2001. It aims to have books circulating in the "wild" so that they can be found and read by people who will then 'release" them again in their turn. The idea is to spin a web of readers at a global level, according to an innovative concept in the field of books and reading which flies in the face of a certain number of traditions, in the search for a different economy for books. The phenomenon has recently reached libraries as a new form of activity beyond the boundaries. It remains to be seen under which conditions this parallel circuit to the usual distribution of books will be viable.