\'Dark, clever, terrifying\' Paula Hawkins, author of The Girl on the Train \'Gripping and moving\' Erin Kelly \'You won\'t want to eat, sleep or blink\' Tammy Cohen. \'Dark, clever, terrifying\' Paula Hawkins, author of The Girl on the Train \'Gripping and moving\' Erin Kelly \'You won\'t want to eat, sleep or blink\' Tammy Cohen