Swallowdale

Swallowdale begins with the four Swallows sailing towards Wild Cat Island. A year has past, the summer holidays have come again, and they are anticipating renewal of their alliance with the Amazons and their friendship with Captain Flint.
Their plans, however, are soon interrupted. Firstly, both their allies and Captain Flint are trapped at Beckfoot by the Amazons' fearsome Great Aunt Maria. Then, when they do briefly escape, John wrecks Swallow, leaving the Walkers unable to camp on the Island.