Seven murders have already been attributed to the unknown serial killer. The special investigation team led by Chief Detective Tom Engelhardt and cryptologist Mascha Krieger is searching feverishly for the perpetrator, but there are no promising leads. At the same time, Mascha tries to find out who the unknown woman is who has been stalking her for weeks and has broken into her apartment at least once. When an eighth victim is found and another encrypted letter surfaces, Mascha and Tom finally understand the nature of the revenge campaign. Mascha also suspects who might be behind the crimes. Time is running out, because if she's right, there will be more victims. However, Mascha is unaware that she too is on the killer's list. When she finally understands the full truth, she makes a fateful decision. biography Karen Sander worked for many years as a translator and taught at university before devoting herself entirely to writing. She lives with her husband in the Rhineland and is currently working on her doctorate about the English thriller author Val McDermid. New product