They are solely owned and issued by Book Tokens Ltd (part of the Booksellers Association Group of Companies).
National Book Tokens are sold and accepted for exchange in almost all UK bookshops, including all major chains.
[3] The Book Tokens scheme was established in 1932, by publisher Harry Raymond.
In the 1990s, this design was changed to a "currency-style" voucher, available in a number of different denominations.
They were replaced by National Book Token gift cards which were identified by a bar code.