The book aims to analyze, investigate and recognize two of the contemporary artistic avant-garde through a multi-disciplinary perspective. Writing first and then the Street Art were always fed from every corner of reality, indiscriminately and free of any “cultural debt”. Today more than ever, this investment can be seen in architecture, urbanism, semiotics, sociology, anthropology and art scene. The difficulty of structuring an unanimous critical profile lies mainly in the multiplicity and dynamism which the two movements have drawn, and anticipated styles, environments, attitudes and collective sensitivity. With over 40 years of history and street experience, Writing and Street Art have had the merit to reproduce and criticize the entire global system of visual communication.