BookMooch is a BookMooch is a book exchange site, based in California, USA. Users can upload their unwanted book information to the site, when someone replies that they want the book, you must mail the book as soon as possible, and then the site will give you the corresponding points, with this point, you can go to exchange for other people's books.

The whole process is to advocate first dedication and then sharing, which is also a kind of vivid embodiment of the fair, free and sharing spirit of the Internet. The website currently supports English, German, Spanish, French, Italian, and Portuguese.

Book exchange sites are gradually making reading a part of the interaction and social behavior of a fixed group of people. On the site, some readers leave a text message, perhaps just a friendly greeting, perhaps a recommendation of the book, and some people will even exchange books and exchange ideas privately.