Freida McFadden is not her real name, but a pseudonym. There is some controversy over whether in her very few appearances, almost always via video call, she wears a wig to preserve her image and privacy. Be that as it may, the American writer is a hit, especially with the novels in the series. The housemaid (The assistant in the translations published in Catalan by Rosa dels Vents). According to Penguin Random House, McFadden has sold more than nine million copies, her books have been translated into more than forty languages, and the rights to adapt them for film and television have been acquired.