防詐3要訣：不聽信、不操作、掛斷電話 
內容簡介
From John David Anderson, acclaimed author of Posted, comes a ghost story pulled from the darkest shadows of middle school.
Riley Flynn is alone.
It feels like she's been on her own since sixth grade, when her best friend, Emily, ditched her for the cool girls. Girls who don't like Riley. Girls who decide one day to lock her in the science closet after hours, after everyone else has gone home.
When Riley is finally able to escape, however, she finds that her horror story is only just beginning. All the school doors are locked, the windows won't budge, the phones are dead, and the lights aren't working. Through halls lit only by the narrow beam of her flashlight, Riley roams the building, seeking a way out, an answer, an explanation. And as she does, she starts to suspect she isn't alone after all.
While she's always liked a good scary story, Riley knows there is no such thing as ghosts. But what else could explain the things happening in the school, the haunting force that seems to lurk in every shadow, around every corner? As she tries to find answers, she starts reliving moments that brought her to this night. Moments from her own life...and a life that is not her own.
- A Supernatural Thriller: When the doors lock and the lights go out, Riley discovers her school is a terrifying place after dark, with a ghostly presence haunting every corner.
- Facing Your Fears: Riley always liked a good scary story, but now she's living one. To survive the night, she'll have to confront the phantoms in the hall--and the ones from her own past.
- Dealing with Loneliness: Ditched by her best friend, Riley feels completely alone. But as she explores the empty school, she learns she's not the only one who has felt abandoned in these halls.
- A Haunting Middle Grade Mystery: Why is the school haunted? And whose life is Riley reliving? The answers lie in the darkest shadows of middle school history.
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