Shepard Sara. Heartless

Heartless.
Author: Sara Shepard.
Publication date: January 19, 2010.
Pages: 274.After the fire, no one believes the girls when they insist that they saw Ali since she mysteriously disappeared. "A" sends Emily to Lancaster, where she discovers that an Amish girl named Leah disappeared around the time of Ali's death. Emily also discovers that Officer Darren Wilden had been Amish and left the community, and she soon comes to believe that he killed Leah. Thinking that Ali's ghost is trying to tell her something, Aria goes to a séance; she learns nothing, but meets Noel Kahn. She initially does not trust him but later changes her mind, kissing him after he comes to her defense at a party. Aria sees another medium, who produces a message in Ali's handwriting that says "Ali killed Ali". Hanna's father sends her to a clinic, The Preserve at Addison-Stevens, to prevent her eating disorder from reappearing due to stress from the Ali situation, and to cure her post traumatic stress disorder. Hanna befriends another patient named Iris,who has an unknown past that may have connection with Ali and later abandons her after another patient reveals Hanna's scandalous past to everyone at the clinic. Hanna dreams about Ali, who leads her to suspect that Iris had something to do with Ali's death. "A" sends Spencer messages which make her suspicious of her mother; Spencer learns that at one point her father had been having an affair with Ali's mother. Spencer realizes the possibility that Ali and Jason are her half-siblings, and is led to believe that her mother may have killed Ali because of it. Spencer confronts her parents, but her mother is shocked to hear about the affair for the first time.Aria, Spencer, Emily, and Hanna are all arrested for Ali's murder; together in a jail cell, they realize that "A" has tricked each of them into believing someone else killed Ali, and turning them all against each other. Jenna Cavanaugh is murdered, and the girls are released when it is discovered that a workman named Billy Ford had been working at both Ali and Jenna's houses when they died. The girls suspect that Billy is the new "A" when they discover that he had been posing as Ian, but later they are taunted by an "A" who may or may not be Billy.