Publisher's Synopsis
..".she will know what to do when the time comes, when the moon returns to the stones."
Twelve year old Halley Armstrong is living on a wild Scottish island, where every 18 years a special full moon appears to dance along the ancient standing stones of Callanish. Halley's astronomer father is preparing to capture the rare event, but the moon has a mysterious power unknown to the scientists.
When Halley has an encounter with what could be a mermaid, a woman with webbed feet who draws Halley into the sea, then disappears, a perilous adventure begins. It leads to the discovery of secrets that have been hidden for generations, and Halley uncovers clues to her own strange ancestry. On the night the moon is at its fullest, Halley finally sees the truth about what lies beneath her beloved coast, and she has to face her own destiny: does she really belong to the human world?
