It's mermaid Vienna's birthday, and her Mer-Gran promised her a big surprise! When Mr. Pelican delivers the package, instead of a present, there's a clue that sends Vienna and her best friend Chloe on a treasure hunt. Solving the clues is fun, but a wrong guess could be dangerous. The girls are determined to find the treasure, and when they do . . . SURPRISE! Sea of Surprises is a book about fun and adventure, but the heart of the story lies in its message that family is far more important than material things.