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Abby Sinclair and Tess McCallum are recurring characters in suspense novels by American author Michael Prescott. The book The Shadow Hunter introduces Abby, while Next Victim introduces Tess. From then on, they team up in the next three novels.
Michael Prescott is an American author of horror and suspense novels. He also writes under the pen names Brian Harper and Douglas Borton. He also has worked as a screenwriter and freelance magazine writer.