In idyllic Rosewood, four very pretty girls just can't help but be bad. . .

Hanna will stop at nothing to be Rosewood's queen bee. Spencer's digging up her family secrets. Emily can't stop thinking about her new boyfriend. And Aria approves a little too strongly of her mom's taste in men.

Now that Ali's killer is finally behind bars, the girls think they're safe. But those who forget the past are doomed to repeat it. And they should know by now that I'm always watching. . .

This is number 5 in Pretty Little Liars .

There are 288 pages in this book. This book was published 2011 by Little, Brown Book Group .

Sara Shepard lives in the US. Pretty Little Liars was inspired by her own upbringing in Philadelphia.