Days without Number is a collection of more than 700 photos shot by Giovanna Silva during the last three years of walks through NYC. Though organized as a calendar, it defies any sense of linear time or chronology, presenting instead a puzzle of images. She walked often more than ten miles a day guided by architecture, seeing as much as she could, obsessively passing by the same site again and again. The book features a text by NYC writer Sasha Frere-Jones.