TWICE WINNER OF THE WOMEN'S PRIZE FOR FICTION WINNER OF THE PULITZER PRIZE FOR FICTION THE MULTI-MILLION COPY BESTSELLING AUTHOR 'One of the best books about climate change.' NAOMI KLEIN 'Lyrical, socially-engaged and passionate.' Sunday Times 'There are many moments of lightness ... and of great beauty, too.' Independent 'A compelling plot with lyrical passages and flashes of humour.' Sunday Telegraph A captivating, topical and deeply human story touching on class, poverty and climate change by the award-winning, global bestselling author of Demon Copperhead and The Lacuna "The flames now appeared to lift from individual treetops in showers of orange sparks, exploding the way a pine log does in a campfire when it is poked. The sparks spiralled upward in swirls like funnel clouds. Twisters of brightness against grey sky." On the Appalachian Mountains above her home, a young mother discovers a beautiful and terrible marvel of nature: the monarch butterflies have not migrated south for the winter this year. Is this a miraculous message from God, or a spectacular sign of climate change. Entomology expert, Ovid Byron, certainly believes it is the latter. He ropes in Dellarobia to help him decode the mystery of the monarch butterflies.