The second book in a stunning new fantasy adventure trilogy, perfect for readers aged 9+ and fans of Philip Pullman, Piers Torday, Abi Elphinstone, Katherine Rundell and Frances Hardinge. Seek the scattered Storm-Opals of Sea, Sky and Land, before an enemy finds them and uses them to wield dark power . . . The trail of the Storm-Opals takes Mouse into a dangerous new world. With little brother Sparrow and friend Crow alongside her, she finds herself in Sky, where fortresses hide amongst the clouds, secret libraries (skybraries) nestle atop icebergs and the air swirls with ferocious flying beasts. Can they solve Da’s message before it’s too late for their ship, their tribe and the whole of Trianukka? Sky-soaring, beast-chattering, dream-dancing, draggle-riding, terrodyl-flying, world-saving adventure.