'I am RIVETED, AGHAST, AROUSED, you name it. The rare instance when prose and plot are equally delicious' Lena Dunham 'Brilliant thriller with attitude, guts and true insight into the nature of obsession' Sophie Hannah 'A fantastically creepy thriller... The kind of book you put your life on hold for' Glamour 'Clever and chilling' Elle 'A brilliant tale... It's Gone Girl meets a sinister version of Girls' Marie Claire