Comprehensive list of Spanish bookshops and editors
Anticuaria Fomento Libros (bookshop)
bol.com
Abstract: an online bookstore
Interbook
Abstract: an online bookstore in Seville
Leer:
Abstract: Free service to search books and where to buy them
LibroWeb
Abstract: an online bookstore
Marcial Pons
Abstract: Bookseller specialised on History books
Ediciones UPC: Universitat Politécnica de Catalunya
Universidade de Santiago de Compostela Servicio de Publicacións
Editoriales Españoles:
Abstract: a database maintained by the Ministry of Education and Culture