If you're interesting in getting a global view of the modernisme movement with some professional direction, you might want to check out the Ruta del Modernisme.
Organized by the Ayuntament de Barcelona (Barcelona City Hall), the Ruta de Modernisme consists of a guidebook with discount vouchers to enter into many different buildings: Museu de Zoologia, Palau de la Música Catalana, MNAC, La Pedrera, and much more.
You can purchase the guidebook at bookshops and the centrally located Barcelona Tourist Information Center, along with some other locations. The new Route Pack includes "Let's Go Out," a guide to modernista bars and restaurants. If you just can't get enough, why not tour, eat and drink... all in modernista establishments!