It focuses upon a cast of San Franciscans and their relationship with emerging uses of nanotechnology .
Postsingular is a 2007 science - fiction novel written by the American writer Rudy Rucker .
Postsingular focuses upon a cast of San Franciscans and their relationship with emerging uses of nanotechnology .
Postsingular is a 2007 science - fiction novel written by the American writer Rudy Rucker .