Hans Ulrich Obrist and Icelandic artist Olafur Eliasson have known each other for many years, and have worked together intimately--on exhibitions, book projects, performances and more. Their legendary conversations, gathered here, are revealing, challenging, philosophical - and essential to both oeuvres.

Hans Ulrich Obrist and Icelandic artist Olafur Eliasson have known each other for many years, and have worked together intimately--on exhibitions, book projects, performances and more. Their legendary conversations, gathered here, are revealing, challenging, philosophical - and essential to both oeuvres.