Swept into the bright hustle and bustle of New York, Lily, Robert and Malkin discover shadowy secrets lie beneath its surface. For there are chilling goings-on in their hotel? A strange boy held captive, haunted by an undersea mystery; and a revengeful villain with a treacherous plan.Searching for clues, Robert and Lily are plunged into deep water? But can they reveal the deadly truth before the secrets submerge them?Join Lily, Robert and Malkin on a fantastic voyage of terror and triumph, in the thrilling fourth and final Cogheart Adventure?

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