Set in Stone by Linda Newbery
When Samuel Godwin, a young and naive art tutor, accepts a job with the Farrow family at Fourwinds, their majestic home, little does he expect to come across such a web of secrets and lies. His two tutees are as different as chalk and cheese - the beautiful younger sister Marianne, full of flightiness and nervous imagination, and Juliana, controlled and sad. With their governess, Charlotte Agnew, Samuel begins to uncover slowly the horrifying truth behind Juliana's sadness and Marianne's emotional fragility. Their discoveries change their perception of life at Fourwinds for ever and none of their lives will ever be the same again.
With her usual brilliance and ease, Linda Newbery has written a haunting and faultlessly plotted novel with characters that leap of the page and stay with the reader long after the last page is turned.