Joy Cowley 
Silent One [EPUB ebook] 

The Silent One is Jonasi, sent from the sea as a baby to grow up in an isolated Pacific village. Separated from the villagers by his silence and their prejudices, Jonasi finds solace in his underwater world where he develops a special relationship with a huge white turtle. However, the superstitious villagers see both Jonasi and the turtle as evil spirits. A series of natural disasters and a struggle for leadership within the village sweep Jonasi toward his strange destiny.