Since the 1950s, the National Library of Scotland has been buying Spanish language books in the humanities, except between 1994 and 2003, when Spanish book acquisitions were suspended. However, subscriptions to Spanish language journals were maintained during this period. United Kingdom publications on Hispanic subjects are received by the Library through the legal deposit privilege.
Non-legal Spanish books acquired by the Advocates Library were transferred to the National Library in 1925. Special collections include the fine Astorga Collection, as well as items in Blairs College Library which contains books from the Scots College in Valladolid. The National Library owns 3,617 volumes which formed part of the library of the Marqueses de Astorga. The collection contains books dating from the 15th century to the early 19th century, covering literature, theology, history, mathematics, geography and travel.
The Library has a subscription to the CD-ROM 'Bibliografia Nacional Española' and also holds the microform 'Archivo biografico de España, Portugal y Ibero-america'.