PaperBackSwap (PBS) is a book swapping website which was founded in 2004.
The purpose of PaperBackSwap is to use the Internet to facilitate the parity trading of books among members in the United States using a credit based system for swapping.
The club also operates sister websites SwapaDVD and SwapaCD to facilitate parity trading of DVDs and CDs, respectively.
PaperBackSwap was founded in 2004 by Richard Pickering, a former economics student, and his friend, Robert Swarthout.
Credits may either be purchased, or they may be earned by mailing books which have been requested.