Dive in The latest fin-tastic tale about a feisty half-mermaid introduces a mysterious boy who shares her fate.

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...

The New York Times best-selling series continues with the half-mermaid embarking on an icy and perilous journey to the Land of the Midnight Sun.
Strange storms are blowing up from the ocean, caused by the nightmares of Neptune, King of the Sea. Convinced that his dreams herald an approaching threat, Neptune enlists half-mermaids Emily Windsnap and Aaron for a top-secret mission to find and eliminate the source of the trouble. But Emily and Aaron quickly get in over their heads in the frigid waters of the frozen north. Deep within an alpine lake where magical reflections show what...