Double Helix (2004), a novel by Nancy Werlin, is about 18-year-old Eli Samuels, who works for a famous molecular biologist named Dr. Quincy Wyatt.  There is a mysterious connection between Dr. Wyatt and Elis parents, and all Eli knows about the connection is that it has something to do with his mother, who has Huntingtons disease.  Because of the connection between Dr. Wyatt and the Samuels family, Elis father is strongly against Eli working there.  The job is perfect, and the wages are great, but Eli cant help but notice that Dr. Wyatt seems to be a little too interested in him.  Later on, as Eli continues to work in the lab, he discovers with the help of Kayla Matheson, Dr. Wyatt's supposed "niece," that he and Kayla are the product of a highly unethical eugenics experiment.