A popular book series by Sara Shepard about four pretty little liars, Aria, Spencer, Emily and Hanna, who have shared a secret since 6th grade... a secret they thought was safe forever. Then the girls start recieving threatening text messages signed by some mysterious person called "A"- Someone who knows everything about them. Suddenly, their big secrets- the ones only known by their dead best friend Ali- are not so secret. Suddenly, nothing in Rosewood is safe.
The Pretty Little Liars book series by Sara Shepard.
Books are Pretty Little Liars, Flawless, Perfect, Unbelievable, Wicked, Killer, Heartless, and Wanted.