'Inverted Sky' is based Marthe Ramm Fortun's site-specific project at Grand Central Terminal, in New York City. The lyrical guided tour of Grand Central Station was part of a performance series for Performa Biennial 2013, an international Biennale for performance art in New York. Fortun's performances often interface with bystanders in public spaces, testing thresholds of boundaries, sometimes resulting in both memorising discomfort and humour. In 'Inverted Sky', the tour itself became somewhat of a spectacle, with many bodies interfacing with the individuals passing through the Terminal. 'Inverted Sky: Letters to Jackie' is structured around a set of texts written by audience members whose participation lends formal parameters to Fortun's own writing. Inspired by the performances, Fortun has imagined a correspondence with Jaqueline Kennedy Onassis, whose own letters helped save the Grand Central Terminal from demolition, and Elizabeth Smart, who wrote a piece of poetic prose entitled 'By Grand Central Station I Sat Down and Wept', 1945, about her life-long failed love story with the writer George Barker.