A lucida intervalla is a Latin phrase describing one of those startling lucid intervals' experienced by the insane. Lucida Intervalla, as imagined by John Kinsella-the Australian poet and novelist-is an art journalist, artist, and social media sensation whose brilliant presence beguiles every one around her. Set in a post-apocalyptic world scarcely distinguishable from our own, Kinsella's new novel follows her exploits and thoughts about art, political protest, eternity, and the absolute. At once a bildungsroman and a novel of ideas whose prose echoes everything from Thomas Browne to Twitter, Lucida Intervalla may well be Kinsella's masterpiece.