<blockquote> <p> Everyone has something to hide—especially high school juniors spencer, aria, emily, and hanna. </p> </blockquote> <p> Spencer covets her sister's boyfriend. Aria's fantasizing about her English teacher. Emily's crushing on the new girl at school. Hanna uses some ugly tricks to stay beautiful. </p> <p> But they've all kept an even <i>bigger</i> secret since their friend Alison vanished. </p> <p> How do I know? Because I know <i>everything</i> about the bad girls they were, the naughty girls they are, and all the dirty secrets they've kept. And guess what? I'm telling. </p>