The addictive new psychological thriller from the author of The Girl on the Train, the runaway Sunday Times Number One best seller and global phenomenon. In the last days before her death, Nel called her sister. Jules didn't pick up the phone, ignoring her plea for help. Now Nel is dead. They say...
Criminal investigating officer Hanne Wilhelmsen considers the possibility of a serial killer as she tracks down a series of numbers written in blood appearing on walls all over Oslo.
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