Audiobook "Killer Dreams" by Iris Johansen

Sophie Dunston, a top-notch sleep researcher, developed a drug to battle the insomnia from which her father and millions of others suffer. But her nefarious former boss and his cohorts have used the drug she created to alter the minds of ordinary people like her father, who killed his wife and threatened Sophie and her young son. With hardened heart, Sophie has one goal: to kill her former boss, since every attempt she's made to expose him to the authorities has failed. Just as she discovers that there are many victims of her nemesis' mind-controlling experiments, one shows up with the same murderous intention. Sophie is leery of Matt Royd, and his first thoughts are to use Sophie, the author of his nightmares, to destroy the others. Brutal and deadly himself, Royd leaves Sophie no choice but to cooperate. The danger increases tenfold as the hunters become the hunted in this suspenseful tale of nightmarish evil.