The Ivy Crown by Gill Vickery
Staying with their father in a bizarre Gothic house in a sinister woodland, Megan and her younger brother, Brand, are struggling to come to terms with their grief and guilt over their mother's recent death.
But the house harbours its own secrets, and soon Megan and Brand find themselves on a quest to find a priceless violin, and the truth about a young woman wrongly accused of witchcraft three centuries ago.
Megan and Brand discover they can put right the mistakes of the past - but only if they choose to accept a dangerous bargain ...