The UK Standard Book Numbering Agency Ltd is the National ISBN Agency for the UK and the Republic of Ireland. It is responsible for assigning ISBN Publisher Prefixes to publishers based in the UK or Republic of Ireland.
Nielsen BookData was formed during July 2002 with the intention of merging Whitaker, first Edition and Book Data. The three companies have served the book industry for more than 140 years. Nielsen BookData offers bibliographic data services to publishers, booksellers and libraries in over 100 countries worldwide.
Nielsen BookNet offers the combined electronic trading services of first Edition and Whitaker through Nielsen BookData