On holiday in Saltbottle, Grandfather and Roo discover the Unsinkable, the boat which took them to the North Pole, lying in a dilapidated state and up for sale. The short-sighted auctioneer accidentally sells the boat to Roo. Now they have to find the money and the Captain suggests a fishing trip to the Great Cod Banks in the Forgotten Sea.

Binding: Paperback;96 pages; Publisher: Penguin Random House Children's UK; Classification: Children?s / Teenage fiction and true stories; Weight: 138 g; Dimensions: 201 x 140 x 7

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