American English, with its vigorous ability to get to the core of things, has an implacably visual word for the kind of person this novel is about – the ‘shut-in’. A shut-in is a recluse, perhaps a cinéaste or stay-at-home opera queen. He (I use my pronouns advisedly – the shut-in is usually a ‘he’) has a rich, century-long genealogy in books and on-screen, from Huysmans’s Des Esseintes and Wilde’s Dorian Gray to Sunset Boulevard’s Nora Desmond and Chatwin’s Utz. Alfred Hitchcock specialised in shut-ins; in Australian cinema, Norman Kaye played a lonely voyeur in Man of Flowers. The shut-in has also given birth to a critical tradition of his own. Some critics like Walter Benjamin have suggested that the habit of collecting may be a response to the twentieth century itself, a kind of specialised aesthetic reflex against consumer culture. Because he is associated with brittleness and the arts, the shut-in is frequently depicted as gay or as a sexual neurasthenic: in his wonderful book The Queen’s Throat, Wayne Koestenbaum has made a bravura anatomisation of the coded campness of the shut-in opera fan.