http://img1.fantasticfiction.co.uk/images/n48/n241634.jpgUnbelievable(The fourth book in the Pretty Little Liars series)(2008)A novel bySara Shepard Trích:Behind Rosewood's grand façades, where the air smells like apples and Chanel No. 5 and infinity pools sparkle in landscaped backyards, nothing is as it seems. It was here, back in seventh grade, that five best friends shared everything - Seven jeans, MAC makeup, and their deepest, darkest secrets. For Aria, Spencer, Hanna, and Emily, it was a dream come true . until Alison, the most beautiful of them all, suddenly vanished. Now someone named A has turned their charmed lives into a living nightmare. Emily has been shipped off to her hyper-conservative cousins in Iowa. Aria is stuck living with her dad and his home-wrecker girlfriend. And Spencer fears she had something to do with Alison's murder. But Hanna's fate is far worse than all of that - she's clinging to life in the hospital, because she knew too much. With A's threats...