Advent Count Down - Book 19

I have read many of Elizabeth George's adult crime novels and loved the story telling and detail. This series is aimed at Young Adults. But it is crime novel with the addition of fantasy. Imagine you could hear what others are  thinking. Becca is on the run from an abusive family situation and has been sent to an island where one of her mum's old school friends lives. But that friend dies just as Becca arrives and Becca is out of phone contact with her mum and has little money to survive on.  One of those stories which raises lots of questions but you just can't put it down!