Title: Pretty Little Liars
Subtitle: Volumes 1 & 2
Description: Pretty little liars : 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.

Flawless: After their friend who has been missing for more than three years turns up dead, four former best friends continue to receive frightening messages from someone who knows damaging secrets about them.
Subjects: Friendship, Juvenile fiction, Secrecy, Conduct of life, High schools, Schools