Are mermaids real? Absolutely! Just ask the four very English children who, while on vacation by the sea, discover a mermaid trapped in a circus. Determined to save her—because they die in captivity—they embark on a daring midnight rescue. Is she really a mermaid? Join us on this adventurous journey filled with underwater battles, fearsome sea monsters, and a host of magical surprises. With bravery and camaraderie, these kids dive into a world of peril and heroism. If you love tales of magic, water, and excitement, and you enjoy the enchanting writing of E. Nesbit, this is the perfect book for you.