Final Girls - By Riley Sager

Ten years ago, six friends went on vacation. One made it out alive….
 In that instant, college student Quincy Carpenter became a member of a very exclusive club—a group of survivors the press dubbed “The Final Girls”: Lisa, who lost nine sorority sisters to a college dropout's knife; Sam, who endured the Sack Man during her shift at the Nightlight Inn; and now Quincy, who ran bleeding through the woods to escape the massacre at Pine Cottage. Despite the media's attempts, the three girls have never met.
 Now, Quincy is doing well—maybe even great, thanks to her Xanax prescription. She has a caring almost-fiancé; a popular baking blog; a beautiful apartment; and a therapeutic presence in Coop, the police officer who saved her life. Her mind won’t let her recall the events of that night; the past is in the past…until the first Final Girl is found dead in her bathtub and the second Final Girl appears on Quincy's doorstep.
 Blowing through Quincy's life like a hurricane, Sam seems intent on making her relive the trauma of her ordeal. When disturbing details about Lisa's death emerge, Quincy desperately tries to unravel Sam's truths from her lies while evading both the police and bloodthirsty reporters. Quincy knows that in order to survive she has to remember what really happened at Pine Cottage.
 Because the only thing worse than being a Final Girl is being a dead one.