A conversation between two writers renowned for their explorations of nature and landscape. Robert Macfarlane's Underland, perhaps the most eagerly anticipated non-fiction book of 2019, takes us on a journey into the worlds beneath our feet. From the ice-blue depths of Greenland's glaciers to the underground networks by which trees communicate, from Bronze Age burial chambers to the rock art of remote Arctic sea-caves, this is a deep-time voyage into the planet's past and future, and into darkness and its meanings. Global in its geography, gripping in its voice and haunting in its implications, it is both an ancient and an urgent work.
Macfarlane, a winner of the Hay Festival Prose Medal, is the author of Mountains of the Mind, The Wild Places, The Old Ways, Landmarks and (with Jackie Morris) The Lost Words. Horatio Clare’s latest books are The Light in the Dark and Something of his Art: Walking to Lübeck with JS Bach – Hay Festival’s Book of the Month for December 2018.
See also event  on 29 May – Spell Songs, a musical performance of The Lost Words – Macfarlane's multi-award-winning collaboration with the artist Jackie Morris.