Thankfully I'm only going to have to wait until the new year.
On the last page of Wanted, there was an add for the Pretty Little Liars television show on ABC Family - which is amazing and you should check it out if you can - but there was also an add for Shepard's next series entitled The Lying Game. It's being called "deadly" and it sounds amazing. Here's the book cover and summary from Goodreads:
New York Times bestselling author Sara Shepard’s new series weaves a mystery of long-lost twins, mistaken identities, a duplicitous circle of friends, and cold-blooded murder. Combining juicy plot lines, to-die-for lifestyles, a tangled web of friendship and romance, magnetic characters, and sharp-witted narration from the afterlife, The Lying Game is an alluring cross between Pretty Little Liars and The Lovely Bones.
Foster kid Emma Paxton has only just discovered Sutton Mercer, the wealthy twin sister she never knew she had, when Sutton drops off the face of the earth, asking Emma to cover for her at home, school, and with her friends—just for a few days. At first Emma enjoys trying on her sister’s fabulous life: her fiercely loyal friends, her adoring boyfriend, her close-knit family. But as Emma is drawn deeper into Sutton’s world she finds the friends are not so fabulous, the boyfriend is not who she wants to be with, and the family is clinging to long-buried secrets and a veneer of functionality. And worst of all, Sutton may not be coming back. In fact, someone may have made sure she never could…and that someone knows Emma is not who she claims to be. Emma will need all her wits to survive The Lying Game.
Gah, I can't wait. The cover looks gorgeous too and so mysterious, of course I don't know if it's the final cover or not. If it's only half as engaging and mysterious as Pretty Little Liars was I'm going to be just as hooked!