"There is a strangeness about Christabel Alderton. Elias Newman can see it right away, as well he might. "When Christabel was 13 she was walking by the River Lea and some people in a cabin cruiser waved to her. The scene before her seemed to freeze like a photograph and she felt weird. A little later the boat blew up and killed everyone on board. Since then she's been troubled by a sort of seco...