Sara Shepard is an American author best known for young adult mystery and psychological suspense, especially the Pretty Little Liars series. Her fiction often begins in polished suburban or school settings, then exposes the secrets, rivalries, betrayals, and hidden pressures... beneath the surface. Pretty Little Liars made her a major name in teen fiction, following Aria, Spencer, Hanna, and Emily as they are threatened by the mysterious “A” after Alison DiLaurentis disappears; the series later became a long-running television adaptation. Shepard also created The Lying Game and The Perfectionists, further developing her signature interest in identity, reputation, friendship, and deception. Readers return to her books for fast pacing, shifting viewpoints, twisty reveals, and suspense built around how dangerous secrets can become.