#1 New York Times bestselling series The sixth book in the #1 New York Times bestselling series that inspired the hit ABC Family TV show Pretty Little Liars. Hanna, Aria, Spencer, and Emily have been lying ever since they became friends with beautiful Alison DiLaurentis. And their bad-girl ways didn't die with her. Hanna's on a mission to corrupt Rosewood's youth, starting with a very attractive sophomore. Aria's snooping into her boyfriend's past. Spencer's stealing—from her family. And pure little Emily's abstaining from abstinence. The girls should be careful, though. There's a new A in town turning up the heat. And this time Rosewood is going to burn. Full of unexpected twists and shocking revelations, Killer is the sixth book in New York Times bestselling author Sara Shepard’s compelling Pretty Little Liars series.

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

In picturesque Rosewood, Pennsylvania, neighbors gossip over picket fences, and gleaming SUVs sit in every crushed-granite driveway. But recently, friendly smiles have been replaced with suspicious glares and accusatory whispers—and it's all because Hanna, Aria, Emily, and Spencer just can't keep their mouths shut. . . . First they claimed they found a dead body in the woods behind Spencer's house, only to have it vanish without a trace. Then when the same woods went up in flames, they swore they saw someone who's supposed to be dead rise from the ashes. And even after all that, the pretty little liars are still playing with fire. Hanna's trading in her Dior trench for a straitjacket. Aria's trying to contact the dead. Emily's dumped her boyfriend and is skipping town . . . again. And Spencer thinks someone in her family has gotten away with murder. The friends insist they're telling the truth about what they saw, but all of Rosewood thinks they're simply out for attention—and nobody likes a girl who cries wolf. So when the big bad killer comes after the girls, will anyone believe them . . . or will they be the next to disappear?

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

Spencer, Aria, Emily, Hanna and their best friend Alison were the most popular girls at Rosewood Day School. Alison was the group's ringleader, the one who knew all their darkest secrets. So when Alison vanished one night, Spencer, Aria, Emily, and Hanna's grief was tinged with relief. But when Ali's body was later discovered in her own backyard, the girls were forced to unearth some ugly memories of their old friend, too. Is there more to Alison's death than anyone realises? Now someone named A, someone who seems to know everything, is pointing the finger for Ali's murder at one of them. And A is poised to ruin their perfect little lives . . . for ever.

In picture-perfect Rosewood, Pennsylvania, pictures often lie-and so do Rosewood's four prettiest girls. Hanna's on a mission to corrupt Rosewood's youth, starting with a very attractive sophomore. Aria's snooping into her boyfriend's past. Spencer's stealing-from her family. And pure little Emily's abstaining from abstinence. The girls should be careful, though. They thought they were safe when Ali's killer was arrested and A's true identity was finally revealed. But now there's a new A in town turning up the heat. And this time Rosewood is going to burn.

It's spring break, and the pretty little liars are trading in Rosewood for a cruise vacation. They want nothing more than to sail into the tropical sunset and leave their troubles behind for one blissful week. But where Emily, Aria, Spencer, and Hanna go, A goes, too. From scuba diving to tanning on the upper deck, A is there, soaking up all their new secrets. Emily is smooching a stowaway. Aria's treasure-hunting partner is a little too interested in her booty. Spencer's going overboard trying to land a new boy. And a blast-or rather, a crash-from Hanna's past could mean rough waters ahead for everyone. The liars better tighten their life jackets. A perfect storm is brewing, and if they aren't careful, A will bury them at sea. . .