The document discusses the collaboration between librarians and architects on library design and construction projects in Barcelona province, Spain. It describes the roles of the Library Service, municipalities, and architects in the process. Key aspects of successful collaboration highlighted include open communication between all parties to understand different perspectives and ensure user needs are met. The case study of the Jordi Rubió i Balaguer library in Sant Boi de Llobregat illustrates how meetings between librarians and architects helped produce a design that balanced functionality with visual impact.