"Cosa dire. Manuale di critica d'arte" (What To Say. Art Criticism Handbook) gets into the core of art criticism. It is not a didactic handbook on "how to" write art criticism, but a book that goes to the essence of criticism: the language and the issues which substantiate the art critic's voice, the expression of his existence meant as a "being in action" (eksistere). The book opens with an "idea/ideal" history of art criticism following the lines traced by the authoritative voice of Giulio Carlo Argan. Then it analyzes the contribution that science offers to art criticism (psychoanalysis, sociology, anthropology, economics, philosophy, epistemology and gender studies).