books.google.com and archive.org have tons of chess books from the 1900s and earlier. All of Howard Staunton's works for example, and a few editions of the German classic "Handbuch des Schachspiels".
For the particular work you are looking for:
http://bvpb.mcu.es/es/catalogo_imagenes/grupo.cmd?posicion=1&path=4869&forma=&presentacion=pagina&config_zoom=S
I've become interested in older chess books such as The Repetición de Amores y Arte de Ajedrez and am looking to see if I can find perhaps some scanned pages of them but have had no luck finding anything online. Other than a few tactical puzzles which are heavily worn there isn't much out there. Anybody here have a link that maybe Google isn't producing or an idea where I can find them (in person)? I understand 15th century is a stretch but anything before the 1900's would be something interesting to see.