Here is an overview of new and notable architecture in a city already known for its unique architectural heritage. One of a series of authoritative pocket guides introduced only last fall, the aNd Guide Barcelona showcases the most innovative designs of the last five years, whether completed (Palafolls Library by EMBT architects, Barcelona Auditorium by Rafael Moneo) or still on the drawing board (Torre Agba by Jean Nouvel, Edificio Forum by Herzog & de Meuron). Easy to use and attractively designed with flexi covers, this CD-sized gem will prove indispensable for tourists and professionals alike who are interested in the built environment