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A gripping murder mystery novel that follows Cassie Hobbes and the Naturals as they investigate a string of brutal murders in Las Vegas. With unique profiling talents, the team is faced with an elusive serial killer who uses different methods for each kill, leaving them baffled. Hidden in the numbers tattooed on the victims' wrists is a code, and the closer they get to decoding it, the more dangerous the case becomes. Meanwhile, Cassie uncovers a personal mystery that adds to the already tense situation. Will the Naturals be able to solve the case before it's too late?