The Dead of Winter by Chris Priestley (author)

When orphaned Michael is invited to spend Christmas with his guardian in a large and desolate country house, his instincts tell him that something is not right. First he sees a woman out in the frozen mists, standing alone in the marshes. And then there is the uneasy solitude of the house itself, where he roams the silent corridors seeking distraction. But lonely doesn’t mean alone, as Michael soon discovers. The house and its grounds harbour terrible secrets, and Michael must unravel them all…