Enders by Lissa Price
With the Prime Destinations body bank destroyed, Callie no longer has to rent herself out to creepy Enders. But Enders can still get inside her mind and make her do things she doesn't want to do. Like hurt someone she loves.
Having the chip removed could save Callie's life - but it could also silence the voice in her head that might belong to her father. Callie has flashes of her ex-renter Helena's memories, too . . . and the Old Man is back, filling her with fear. Who is real and who is masquerading in a teen body?
The thrilling sequel to Starters.