PositiveThe Times Literary Supplement (UK)Gainza is an art critic, and her story progresses through a series of wonderful images, as if followed through a View-Master ... Gainza is fast becoming one of Argentina’s most sophisticated writers thanks to the imaginative twirls her writing takes. That can make her hard to follow sometimes – Portrait of an Unknown Lady incorporates confessions, interviews, court records, art catalogues and true stories hidden in false stories \'like rhinestones in the snow\', in M’s words – but there is a joy in the freedom with which she turns the traditional art crime thriller on its head.