'Twisty, creepy and absolutely absorbing' Sarah Pinborough'A helter-skelter collision of social media and the supernatural. Hugely enjoyable' Chris Brookmyre'A fiendishly smart exploration of obsession and social media addiction' Sarah LotzKate Collins has been ghosted.She was supposed to be moving in with her new boyfriend Scott, but all she finds after relocating to Brighton is an empty flat. Scott has vanished. His possessions have all disappeared. Except for his mobile phone.Kate knows she shouldn't hack into Scott's phone. She shouldn't look at his Tinder, his texts, his social media. But she can't quite help herself. That's when the trouble starts. Strange, whispering phone calls from numbers she doesn't recognise. Scratch marks on the door that she can't explain. And the growing feeling that she's being watched . . .Jason Arnopp - author of The Last Days of Jack Sparks, a Radio 2 Bookclub pick - returns with a razor-sharp thriller for a social-media obsessed world. Prepare to never look at your phone the same way again . . .