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?