The fourth book in the #1 New York Times bestselling series that inspired the hit ABC Family TV show Pretty Little Liars.

Four pretty little liars' charmed lives have turned into living nightmares. Emily's been shipped off to Iowa to live with her überconservative cousins. Aria's boyfriend is behind bars--because of her. Spencer's afraid she was involved in Ali's murder. But Hanna's fate is far worse: She's clinging to life in the hospital because she knew too much. These liars have tried to keep their scandals secret, but the truth is about to rock their pretty little world!

Full of unexpected twists and shocking revelations, Unbelievable is the fourth book in New York Times bestselling author Sara Shepard's compelling Pretty Little Liars series.