Wade Davis, author of Magdalena: River of Dreams, gave a talk recently in a session organised by 5×15, which books “world-leading figures to speak to audiences to spark ideas and inspiration”. Contributors to the same session included Helen (H is for Hawk) Macdonald, talking ahout her new essay collection, Vesper Flights, and Merlin Sheldrake, whose debut, Entangled Life: How Fungi Make Our Worlds, Change Our Minds & Shape Our Futures, has been generating rave reviews.