AustLit

'An exclusive group chat. A deadly challenge. How far would you go to join? Jayden Jones is missing. Everyone thinks he ran away. His best friend, Zoe Ross, knows they're wrong. Zoe's search leads her to the Seventeen, a secret group chat, used by anonymous teens to blackmail the powerless. To join, you have to put on a mask and record yourself completing a challenge. The challenges are always illegal. Sometimes dangerous. Maybe deadly. Who are the Seventeen? What have they done to Jayden? And what will they do to silence Zoe? A rollercoaster of suspense and twists from the author of the Liars series.' (Publication summary)

'Elise Glyk is a disgraced athlete. Her brother, Callum, is a well-liked teacher who has gone missing. In Elise’s search for her brother, they both become captured in a remote, abandoned farm. 

'Their captor hates Callum, and refuses to explain why, but she has little interest in Elise. So she offers a gruesome bargain: she'll let Elise go - if Elise kills Callum. That way, Elise can't talk to the police, not without getting arrested for murder.

'Years ago, when everyone turned against Elise, Callum was the only person who stood by her. But if Elise refuses the deal, they'll both die. With the clock ticking, Elise is forced to confront the choice: will she kill her brother to save herself?' (Publication summary)