The #1 New York Times bestselling series that inspired the hit ABC Family TV show Pretty Little Liars and the upcoming HBO spin-off series Pretty Little Liars:

High school seniors Aria, Emily, Hanna, and Spencer have been tortured by A for too long. Now they're determined to take the fight to A . . . even if it's the l

Hanna, Spencer, Emily and Aria are trying to move on and forget about their old friend Alison DiLaurentis and all the torture she put them through, but someone

#1 New York Times bestselling series The fourth book in the #1 New York Times bestselling series that inspired the hit ABC Family TV show Pretty Little Liars. F

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