Whistle in the Dark by Emma Healey
How do you rescue someone who has already been found?
Jen’s fifteen-year-old daughter goes missing for four agonizing days. When Lana is found, unharmed, in the middle of the desolate countryside, everyone thinks the worst is over. But Lana refuses to tell anyone what happened, and the police think the case is closed. The once-happy, loving family returns to London, where things start to fall apart. Lana begins acting strangely: refusing to go to school, and sleeping with the light on.
With her daughter increasingly becoming a stranger, Jen is sure the answer lies in those four missing days. But will Lana ever reveal what happened?