Emily Windsnap and the Castle in the Mist

When Emily Windsnap discovers an old diamond ring during a class hunt for trinkets, how is she supposed to know that the ring is half the key to unlocking an ancient curse by Neptune himself? Now, with the ring stuck firmly on her hand, Emily finds herself under a new curse: in just a few days, she'll cease to be half-human and half-mermaid and must say good-bye to one parent forever. Can she possibly find the other missing ring that will break all the curses? Is there anyone who can help her.

The Emily Windsnap series of children's novels features a 12-year-old girl who lives alone with her mother on a boat by the seaside. When Emily takes swimming lessons, she finds out something she did not know about herself. Emily is a semi-mer which means when fully immersed in water she has a mermaid's tail but when she is on land she has human legs. However, her mother appears to remember nothing about mermaids or even Emily's own father. Now Emily and her newly found friend Shona Silkfin embark on a trip through the mermaid realm to find out the truth about her, her father and mother, and the unusual Mr. Beeston, the lighthouse keeper.