The Invisible Girl in Room Thirteen

When fifteen-year-old Alison Locke arrives at the prestigious Waterfall Secondary Academy, she's determined to disappear into the background. After losing her father and becoming invisible in her own mother's new family, fitting in feels impossible.

Then she's dared to spend one night alone in the abandoned Room Thirteen.

The room has stood empty for fifteen years.

Its last occupant, Lily Martin, walked into the lake behind the school on Valentine's Eve and never came back.