In 1956 Sarah Dewhurst's father shocks her by hiring a dragon to work the farm. The dragon is a smaller blue rather than the traditional larger reds, though even the reds are now scarce. When the blue dragon, Kazimir, unexpectedly saves Sarah and her friend Jason Inagawa from the attentions of the racist police deputy, Kelby, everything changes. Sarah is part of a prophecy and she must escape the clutches of Malcolm, an assassin from a Believer Cell, the dragon-worshiping cult. When Sarah, Malcolm and Kazimir eventually converge, they are thrown into another universe, where dragons seem never to have existed. Can they save this world and the one they left?

"Wonderful and mind-blowing and exhilarating and heart-stopping. What a storyteller! I loved it!" - Russell T Davies

"I'm completely gripped by this story of revenge, redemption and dragons from the double Carnegie Medal-winner." - The Bookseller

"A summer blockbuster of a novel: exciting, clever and moving. Somehow, Ness just keeps getting better." - Juno Dawson

"Ness brilliantly juggles these multi-layered themes and twisting plot lines while creating a world where dragons are as richly imagined as humans and engage our emotions just as forcefully. He is a remarkable talent." - The Daily Mail

"With two Carnegie medals to his name, Patrick Ness is a literary giant in young adult fiction, and his books remain gloriously original and unpredictable… Mind-bending in the best possible way." - The Observer (The New Review)