Frozen Charlotte by Alex Bell

When fifteen-year-old Sophie’s best friend dies abruptly under mysterious circumstances, Sophie sets off to stay with her uncle and cousins on the remote Isle of Skye. It’s been years since she last saw her cousins — brooding Cameron with his scarred hand; Piper, who seems too perfect to be real; and peculiar little Lilias with her fear of bones.

Sophie knows that in her uncle’s house, there are rules she must follow: Make no mention of Cameron’s accident. Never leave the front gate unlocked. Above all, don’t speak of the girl who’s no longer there, the sister whose room lies empty of all but the strange antique dolls she left behind… Read more.