The book introduction joins the 11 chapters and clarifies that the “Cremisi” project marks a sort of continuity with the previous prject named “New book economy”, addressed mainly to publishing for libraries. Cremisi “asks librarians and the new professional figures, and the requirement of personnel requalification.. due to the introduction of new technologies”: Cremisi’ keyword is ‘mediatheque’, without forgetting ‘information society’. The ‘ideal library’ must manage, let use and develop traditional as well as multimedia material.