Serafina and the Black Cloak meets The Little Mermaid in this enchanting sequel to The Frost Fair, where best friends Thomasina and Anne must face a new magical threat to London.
After facing down Father Winter and escaping the Frost Fair, Thomasina and Anne have achieved their dream. Without needing any wishes at all, they're running their own sweetshop.
But magical creatures and otherworldly beings aren't quite done with them yet, and they soon find their friend Henry kidnapped by an evil Sea Queen and dragged down into the depths of the River Thames.
Determined to save him, the girls venture into the deep and discover the enchanting world of the Free Waters: a vast, glittering underwater city, home to mermaids, sirens, and selkies. But the journey to rescuing Henry is more dangerous than they could have imagined, and the Sea Queen a powerful enemy-one who might be even stronger than Father Winter himself.
- Best Friends Adventure: Thomasina and Anne have their dream sweetshop, but when their friend Henry is kidnapped, they must trade candy-making for a dangerous quest.
- A Hidden Underwater City: Venture beneath the River Thames into the Free Waters, a glittering kingdom of magical creatures that holds the only key to saving Henry.
- Family Secrets: As Thomasina fights to save her friend, she uncovers a secret magical heritage of her own?a power she never knew she possessed and must learn to control.
- A Villain Stronger Than The Last: The evil Sea Queen's power is immense, and her connection to the defeated Father Winter is a terrifying mystery the girls must solve to survive.
