Pretty Little Liars (Book)

Pretty Little Liars is a series of young adult novels by Sara Shepard and a TV series on ABC Family. The series follows the lives of four teens — Spencer, Hanna, Aria, and Emily — whose clique falls apart after the disappearance of their leader, Alison. Three years later, after the discovery of Ali's body, they begin receiving text messages from an anonymous source, "A", who threatens to expose their secrets — including long-hidden ones they thought only Alison knew.