The stalker's identity has finally been revealed, but Spencer, Emily, Hanna and Aria are bound to repeat the past, and continue to be bad.

#1 New York Times bestselling series The ninth book in the #1 New York Times bestselling series that inspired the hit ABC Family TV show Pretty Little Liars. It's been a year since the mystery of their former friend's disappearance was finally laid to rest, and Aria, Spencer, Hanna, and Emily have worked hard to put their lives back together. Now seniors in high school, the pretty little liars are older, but they're not any wiser. Last spring break...

#1 New York Times bestselling series The third book in the #1 New York Times bestselling series that inspired the hit ABC Family TV show Pretty Little Liars. In Rosewood, Pennsylvania, four perfect-looking girls aren't nearly as perfect as they seem. Aria can't resist her forbidden ex. Hanna is on the verge of losing her BFF. Emily is freaking out over a simple kiss. And Spencer can't keep her hands off anything that belongs to her sister. Although...

#1 New York Times bestselling series The second book in the #1 New York Times bestselling series that inspired the hit ABC Family TV show Pretty Little Liars. In ultra-exclusive Rosewood, Pennsylvania, four beautiful girls are hiding very ugly secrets. Spencer covets her sister's boyfriend. Aria is fantasizing about her gorgeous young English teacher. Emily is infatuated with the new girl at school. And Hanna is using some ugly tricks to stay amazingly...

Former best friends Emily, Aria, Hanna, and Spencer continue to live in fear as they struggle to keep hidden even more secrets and someone new begins stalking them via their cell phones.

After high school juniors Spencer, Emily, Hanna, and Aria think they have seen Ali, their missing and presumed dead friend, they pursue clues from a mysterious stalker, trying to find out if she is still alive.

Struggling to return to normalcy after surviving Alison's attempt to kill them, Spencer, Aria, Emily and Hanna endure a series of disasters before realizing that they are being stalked by a new "A" who knows all of their secrets.

In the weeks leading up to Ali's murder, Ali reveals her plots against Emily, Hanna, Aria, and Spencer, as well as a dark secret that has the potential to destroy everything.

It's finally summer in Rosewood, Pennsylvania, which means afternoons at the pool, high school graduation -- and the end of the scandal that has rocked the town for years. Or so everyone thinks. It's been weeks since police caught the notorious stalker and murderer known as A. But Hanna, Aria, Emily, and Spencer know that the real A is still out there. And as long as A is on the loose, nothing can ever go back to normal ... if there is such a thing...

After their missing friend's body is found and another of their friends commits suicide, four former best friends live in fear of their secrets being exposed by someone who is stalking them via their cell phones.