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. 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?
