I Know You: A gripping suspense thriller with a heart-stopping twist

'I can help you save your sister. But I need something from you ...' Sisters Bree and Alissa Walker share a special bond. Neglected by their parents, they have always looked out for one another. But one day, sixteen-year-old Alissa goes missing. When Bree discovers her green backpack with all her belongings, abandoned on the steps of their run-down trailer, she knows that something bad has happened ... Then she receives a chilling text message. Someone has Alissa. But Bree will have to give...