The Air Is Blue was an exhibition orchestrated in Luis Barragán's house and studio by Hans Ulrich Obrist and Pedro Reyes, featuring Francis Alÿs, Dominique Gonzales-Foerster, Rem Koolhaas, Lygia Pape, Anri Sala, Ettore Sottsass, Rikrit Tiravanija and Niele Toroni, among others; this volume is a reprint of the 2006 catalog for that exhibition.