In the exclusive town of Rosewood, Pennsylvania, where the sweetest smiles hide the darkest secrets, four pretty little liars—Spencer, Aria, Emily, and Hanna—have been very bad girls. . . .<br/>Spencer stole her sister's boyfriend. Aria is brokenhearted over her English teacher. Emily likes her new friend Maya . . . as much more than a friend. And Hanna's obsession with looking flawless is literally making her sick. But the most horrible secret of all is something so scandalous it could destroy their perfect little lives.<br/>And someone named "A" is threatening to do just that.<br/>At first they thought A was Alison, their friend who vanished three years ago . . . but then Alison turned up dead. So could A be Melissa, Spencer's ultracompetitive sister? Or Maya, who wants Emily all to herself? What about Toby, the mysterious guy who left town right after Alison went missing?<br/>One thing's for certain: A's got the dirt to bury them all alive, and with every crumpled note, wicked IM, and vindictive text message A sends, the girls get a little closer to losing it all.