The Goonies: Cavern of Horror

Publisher's blurb:

Meet the Goonies - Mikey, Mouth, Data, Brand, Andy, Chunk, and Stef. They live in a small fishing village called the Goon Docks. And each one has taken the Goony Oath to stick together until the world ends.

Now the Goonies face their biggest challenge ever - to save the Goon Docks from being torn down. Things are looking desperate...until Mikey finds the treasure map of One-Eyed Willy, a pirate who disappeared long ago. If the Goonies can find his hidden treasure, they can buy back the Goon Docks. But it won't be easy.
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Based on the story by Steven Spielberg and the screenplay by Chris Columbus, with full colour photographs throughout, this is the tie-in book that no Goonies can can afford to be without!