ReadItSwapIt (RISI) is a book exchange website co-founded in 2005 by Andrew Bathgate and Neil Ferguson of London, UK. It facilitates direct swapping of books among its members in the UK.
Operation
ReadItSwapIt operates a "direct swap" method of exchange, where a single book belonging to one member is exchanged for a single book belonging to another member. This is contrast to other book swap sites, which offer a credit-based system of exchange.
References
ReadItSwapIt Wikipedia(Text) CC BY-SA