Winter (Marsden novel)

Winter is a 2000 young adult novel by John Marsden. Winter, the protagonist of the story, returns to the family estate she left at four when her parents died. She finds that everything is not as it seems when she visits her parents' graves, and she is determined out the answers.
Plot summary.
For twelve years since the age of 4 Winter has been haunted. Her past, her memories, her feelings, will not leave her alone. And now, at sixteen, the time has come for her to act. Every journey begins with a single step. If Winter is going to step into the future, she must first step into the past. Winter returns to her family estate of Warriewood, neglected since the death of her parents when she was four years old; she will stop at nothing to uncover the mystery behind their deaths.