The dark light / Julia Bell.

Rebekah has lived on the island her whole life, and it's only now that she's starting to wonder what she might experience outside her strict religious community. Alex has been sent to the island to escape her dark past, and through her eyes it's a dark and sinister place. Thrown together by chance, Rebekah and Alex strike up an unlikely friendship and it's together that they attempt to break free of their worlds and make a world of their own. But when a kiss between the girls is witnessed by an islander there is no escape they can make - the Rapture is coming for them all.