Emily Windsnap and the Castle in the Mist - Liz Kessler

The third novel of Kessler's New York Times-bestselling series featuring half-human, half-mermaid Emily Windsnap. An old diamond ring turns out to be half the key to unlocking an ancient curse put in place by Neptune himself. Can Emily find the other missing ring to break the curse? Illustrations. The New York Times best-selling series The third fin-tastic tale about the feisty half-mermaid introduces a mysterious boy who shares her fate.