PRE-ORDER NOW! A CHILLING THRILLER FROM THE SUNDAY TIMES BESTSELLING AUTHOR OF INTERNATIONAL PHENOMENON, THE WHISPER MANThe 50/50 killer preys on couples. He manipulates their love for each other and makes them play a game. He stalks them, tortures them and then forces them to choose. What is going to break first? Their will or their love for each other?Only two things are certain:One of them will die. And the other will have killed them. Praise for Alex North'The best crime novel of the decade' Steve Cavanagh'A thriller that is both terrifying and utterly heartbreaking.Mesmerising and masterful' Mark Billingham'This is a true skin-crawler' Guardian'Shades of Thomas Harris and Stephen King but brilliant in its own right' C.J.Tudor'First it's spooky. Then it's scary. Then it's terrifying' A.J. Finn