Book drifting (Bookcrossing) is a famous book drifting website in the United States. It is also a social networking website with books as the carrier - giving each book or document a special identity, which can track and connect reader information and transfer it from one reader to another, so as to achieve the purpose of reading and social networking. At present, the website has 1017709 readers from 132 countries and regions 9041948 books from "bookcrossers".
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