From publisher blurb: Do you dare learn the secret of the lost mermaid? You're spending the summer at a seaside boardinghouse. One moonlit night you hear someone crying on the beach. You peek out your window — and see a mermaid named Tana. You'd like to help her, but she's in a terrible mood. "I don't know where the rest of the mermaids are," she snaps. "I've been looking for two days, but I can't find any of them. And if you want to hear any more, you'll have to follow me underwater!"