The Internet Archive (archive.org) is a non-profit digital library offering free public access to millions of books, movies, and software. It operates under the principle of controlled digital lending. This is where the keyword comes into play.
Puedes descargar el PDF de "La Vida de Lazarillo de Tormes" de Vicens Vives en el Internet Archive: [enlace] el lazarillo de tormes pdf vicens vives internet archive