In 1961, Joan Colom, a leader in the 'New Avant-Garde' (nova avantguarda) photography movement along with Català-Roca, Miserachs and Maspons, put on show at the Sala Aixelà in Barcelona a series of photos taken between 1958 and 1960 in the 'Barri Xino' using hidden camera techniques. The MNAC reconstructed this exhibit in 1999 using originals conserved by the Agrupació Fotogràfica de Catalunya. The goal of both the exhibit and its accompanying catalogue were to re-situate Colom within the nova avantguarda and to recognize the importance of critic Josep Maria Casademont's work in diffusing photography in the 60's. Notes provide information on techniques employed by Colom in taking, developing, and exhibiting his photographs. This volume closes with a cataloguing of the exhibited works, a methodical bibliography and the Spanish translation of the texts.