Art historian Charles Hope, in a review of three books about the world’s most expensive painting, lays out an extensive argument against the attribution of Salvator Mundi to da Vinci and suggests that the UK’s National Gallery, by including it in its 2011 Leonardo exhibition, helped (wittingly or not) pump up the work’s resale value. Both the New York dealer who had the painting at that time and the National Gallery’s then-director respond in letters, and Hope follows up with a counter-response. – London Review of Books