The 16th adventure in the Isadora Moon series--she's half vampire, half fairy, totally unique! Isadora has been invited to a sleepover under the sea with her mermaid friends, it's so exciting! But when she arrives she meets a mermaid called Emerald, who doesn't seem quite so pleased to be there. Can Isadora find out what is the matter? It's the beginning of a magical underwater adventure!

This beautiful, charming, funny series of first chapter books is perfect for readers who want their magic and sparkle with a bit of bite! Isadora loves the night, bats, and her black tutu, but she also loves the sunshine, her magic wand, and Pink Rabbit. She is proud to be different, but with parents like hers, everyday activities don't always go to plan!