This guide is intended for students and researchers studying the law and legal system of Spain at the University of Oxford, although students and researchers from any field may find it useful.
Use this guide to find out about sources and commentary for Spanish law, including ebooks, ejournals, and databases.
This guide -- and the Law Library's resources -- focus on the Spanish legal system and laws at the national level, rather than on the laws of the Comunidades autónomas.
The Bodleian Law Library's current collection of printed commentary on Spanish law have shelf marks starting Spain.
The Library's General and Comparative section also contains works which compare aspects of law between two or more countries, and many of these may discuss Spanish law.
You can search the library's catalogue via SOLO; if doing a subject search remember to put 'Spain' at the end of your search terms, e.g. 'Contracts Spain'.
If you are new to this jurisdiction, the following may be helpful:
Spanish law and legal system by 
Introduction to Spanish Private Law by 