This method is very common here in South America.
It looks like the Carulli method, with more exercises and a lot of selected pieces. It is some sort of romantic methods compilation, include a nice selection of pieces by several composers (Aguado, Coste, Sor, Carulli, Cano, Tarrega etc.) .
The fingerings have a romantic Tarrega-like approach with several portamentos on Sor pieces, for example, which may sound out-of-style to a modern ear. Despite of this detail, I like a lot those books.
Here in Brazil I can buy on several online music stores:
These websites are in Portuguese and I don't know if they sell overseas, but I guess musimed does it. On their mein page there is a link to foreign customers. Try emailing them.