Greg Krojac 
The Janus Project [EPUB ebook] 

Eloise Hudson, Caucasian, female, twenty-five years old, winces with pain as she feels the blade draw across her skin. She has no idea why her captor took her or why he tortures her so. She doesn’t know him and has done nothing to harm or offend him – not as far as she knows, anyway. Perhaps her very existence is enough to sign her death warrant.
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In this sci-fi thriller, a serial killer is terrorizing a city but the police have no leads until the murderer makes a mistake and leaves DNA on the body of his latest victim. However, analysis of the sample does nothing to help the police investigation. The perpetrator is not in the system – an impossibility, since everybody is in the system.
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How can the police catch the killer if they have no identifying data? A forensic scientist comes up with an innovative solution which takes the criminal investigation into the ethical minefield of human cloning.