Sara Shepard

Seventeen-year-old Emma Paxton steps into the life of her long-lost twin Sutton to solve her murder, while Sutton looks on from her afterlife.

The stalker's identity has finally been revealed but high school juniors Spencer, Emily, Hanna, and Aria seem condemned to repeat the past as they resume their unrepentant ways.

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.

Sutton Mercer watches as her long-lost twin, Emma Paxton, takes over her identity to solve the mystery of her murder, but when the potential killer--handsome Thayer Vega--returns to town, Emma must act quickly before it is too late.

When one of their tightly-knit group mysteriously disappears, four high school girls find their friendship difficult to maintain when they begin receiving taunting messages from someone who seems to know everything about their past and present secrets.