The International ISBN Agency is appointed by ISO as the registration authority for the ISBN system worldwide.

The International ISBN Agency is based in London, UK and you can contact us as follows:

International ISBN Agency
48-49 Russell Square
London
WC1B 4JP
UK

Tel:                 +44 (0) 20 7580 8536

Email:             info@isbn-international.org

To find out more about what we do, click here