The twisty gripping number one bestseller from Richard and Judy Book Club winner Clare Mackintosh author of I Let You Go. Winner of the Richard and Judy Summer Book Club 2017 When Zoe Walker sees her photo in the classifieds section of a London newspaper she is determined to find out why it's there. There's no explanation: just a grainy image a website address and a phone number. She takes it home to her family who are convinced it's just someone who looks like Zoe. But the next day the advert shows a photo of a different woman and another the day after that. Is it a mistake? A coincidence? Or is someone keeping track of every move they make... If you like Shari Lapena Paula Hawkins Rachel Abbott B A Paris Fiona Barton Ruth Ware and CL Taylor you'll love this gripping psychological thriller.