Kaitangata Twitch by Margaret Mahy
Kaitangata is an island with a rocky fist punching skywards. Kaitangata seems to have a will of its own, and a voice, although only Meredith can hear it...'What we need is a powerful enchantress,' Meredith cried. 'Someone who could put a spell on Marriott.' As she spoke, a strange thought came into her head, running round and round inside her like a mouse on a pet-shop wheel. It was not a thought she could share, for it had a wickedness hidden in it and Meredith did not want anyone to know just how wicked she could be, even if it was only in her dreams. Can Meredith save the island from an unscrupulous developer? How could the dreamer of the family succeed where grown-ups have failed? Only Kaitangata can tell...Kaitangata Twitch is an engaging family story and a spellbinding supernatural thriller, by an author who has won international acclaim.