The third edition of this volume, a joint publication with the Advisory Council on Latin American and Iberian information Resources (ACLAIIR), provides details of more than 200 collections in national, university, public and special libraries in the United Kingdom and the Republic of Ireland. The scope of each collection is described and details are given of opening hours, admission requirements, addresses and other contact information. Where available, the URLs of internet home pages and addresses of online catalogues via telnet or the Web are listed. The volume is indexed by subject, country/region and organization/institution. Details are also given of collections which appeared in earlier editions and which have since been renamed or incorporated in other libraries.