Pretty little liars

After their friend Alison, missing for more than three years, turns up dead, four former best friends, each of whom had a secret known only by Alison, begin receiving frightening messages from someone identified by the letter "A.".

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.

Best friends Spencer, Aria, Emily, and Hanna find themselves under suspicion when the mysterious stranger named A tries to blame one of the girls for the death of their friend Alison and threatens to reveal the girls' darkest secrets.

Spencer, Hanna, Aria, and Emily, friends since seventh grade at the exclusive Rosewood school in Pennsylvania, find their history of telling small, convenient little lies catching up with them when a mysterious person named A begins making threats, hinting that he or she knows what really happened to their murdered friend Alison.

Contains the third and fourth books in Sara Shepard's Pretty Little Liars series, in which four girls from Pennsylvania's elite Rosewood neighborhood hide shocking secrets following the disappearance of their best friend.

On trial for murdering an actually still-alive Alison DiLaurentis, only Aria, Emily, Spencer, and Hanna know they have been framed and resolve to beat Ali at her own game.

Contains the first two books in Sara Shepard's Pretty Little Liars series, in which four girls from Pennsylvania's elite Rosewood neighborhood hide shocking secrets following the disappearance of their best friend.

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.

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.

Hanna, Aria, Emily, and Spencer have been telling some outrageous stories, but no one seems to believe them, so when a killer comes after them, they wonder if the town of Rosewood will believe them.