This book documents collaborative public art performances based on a POLICE LINE DO NOT CROSS tape altered to read ART LINE DO NOT CROSS. Produced during 2003 in the cities of Napoli, Berlin, New York, Milan, London, Venice, Bologna, Jakobstad, Pforzheim, Millwaukee, Perugia, Novi Ligure, Gleisdorf, Cesena, Weerde, Torino, and Chappaqua as collaborative actions by Alisa, Coco Gordon, Antonio Picardi, Jonathan Monk, Emilio Fantin, Nello Teodori, Marzia Migliora, Robin Kahn, Robert C. Morgan, Giancarlo Norese, Luc Fierens, Anton Roca, Nicola Renzi, Gabriele Di Matteo, Eva Forsman, Rita Degli Esposti, Steffen Mueller, Martin Krusche, Vito Pace, Mary Jo Walters, and Tony Knox, realized by Angelo Ricciardi as his solo show at 404 arte contemporanea, Naples, Italy with his impossible Marcel Duchamp, Piet Mondrian, Hugo Ball and Richard Hamilton who return to their roles and responsibilities in the historic Avantgarde. Catalog texts written by Francesca Comisso (a.titolo), Vinni Lucherini, Vincenzo Cuomo.