Finding books to read in Spanish nearly the same as trying to find books to read in English, it'll definitely be specific to your interests. Also, a lot of popular fiction books are translated into Spanish, so you might be able to find your favorite book translated.
As far as books originally written in Spanish - Don Quixote - Miguel Cervantes (quite a heavy tome, but even if you find an abridged version it'll help you get some cultural context), El Amor en Los Tiempos de Colera & Cien Años de Soledad - Gabriel Garcia Marquez, El Alquimista - Paulo Coehlo, La Casa de los Espiritus - Isabel Allende.
As for music my mom always listened to a band called Mecano when I was little, they're from Spain and a lot of their lyrics are more story telling so that could be fun for you! Some of their popular songs are Hijo de la Luna, La Fuerza del Destino, Aire and Ana y Miguel.