Murder, mayhem and mystery meet in the gripping Victorian world of the bestselling series,The Cogheart Adventures... Join Lily, Robert and Malkin on a fantastic voyage of terror and triumph in Shadowsea, their fourth and final adventure, from award-winning Peter Bunzl. Dark secrets never stay submerged for long. Swept into the bright hustle-bustle of New York, Lily, Robert and Malkin discover that danger lies beneath the city's surface. For there are chilling goings-on... A strange boy held captive who needs their help, and a shadowy professor with a treacherous plan. Searching for clues, Robert and Lily are plunged into deep water... But will they uncover the deadly truth in time to survive? Praise for The Cogheart Adventures: "A steampunky tale of ambition, pursuit and revenge." The Guardian "Expect thrills, mayhem and mystery." BookTrust "A delightfully badly behaved heroine, enthralling mechanicals and a stormer of a plot." Abi Elphinstone "A glittering clockwork treasure." Piers Torday