Seventeen-year-old Charlotte barely escaped from her abusive parents. Her little brother, Sam, wasn't as lucky. Now she's trying to begin the new life she always dreamed of for them, but never thought she'd have to experience alone. She's hired a techie-genius with a knack for forgery to remove the last ties to her old life. But while she can erase her former identity, she can't rid herself of the memories. And her troubled history won't let her ignore the little girl she sees one day in the park. The girl with the bruises and burn marks.That's when Charlotte begins to receive the messages. Threatening notes left in her apartment--without a trace of entry. And they're addressed to Piper, her old name. As the messages grow in frequency, she doesn't just need to uncover who is leaving them; she needs to stop whoever it is before anyone else she loves ends up dead.
Piper has grown up living locked in her parents' attic along with her younger brother, Sam; finally, at age 17 (she thinks) she escapes to Philadelphia, free for the first time, though she leave a trail of bloodshed behind her and carries no small amount of trauma with her. With the help of Cam, a handsome teen she hires to forge an ID and establish a new identity, Piper becomes Charlotte Thompson and tries to start over. That isn't easy, especially after she meets a terrified girl in the park, obviously abused, who Charlotte feels compelled to rescue. Soon Charlotte is being hunted by someone who knows who she really is, and whose threats become increasingly terrifying. Johansson (Paranoia) never loses sight of her determination to instruct readers about the evils of human trafficking and child abuse, but her story suffers from sensationalism. Charlotte's reasons for not seeking out or trusting the police are never fully justified, further stretching the limits of believability in this grim, brutal novel. Ages 14 up.
I haven't read it but it sounds good