"La Asistente Te Vigila" (which translates to "The Assistant Is Watching You" in English) is indeed a thriller or psychological suspense novel written by Freida McFadden. The book revolves around the story of a woman named Millie, who takes on a job as an assistant to a powerful businesswoman. As Millie becomes more entrenched in her role, she starts to uncover dark secrets and the true nature of her boss and the company she works for.