The main purpose of this paper is to analyse the relation between the spatial and individual structures in Paul Austers City of Glass. The interpretative discussion is focused on the novels metafictive aspects. The analyses consists that Quinn, the main character, is linked to the city environment because of his function as detective, flânuer and author. According to Baudelaire, Benjamin and Berman the two last positions are fundamental in the literary citystructure, as well as in the formation of individuality and modernity.